Professor's Warning #84
STX
Strixhaven: School of Mages
EN
Details
Professor's Warning
Choose one —
• Put a +1/+1 counter on target creature.
• Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familiar with the rise of tyrants.
Set Name
Strixhaven: School of Mages
Set Code
STX
Set Series
Strixhaven: School of Mages
Card Number
84
Language
EN
Variant
Regular Version
Rarity
Common
Colour
B
Play Cost
{B}
Card Type
Instant
Card abilities
Plus Counters, Counters Matter
Illustrator
Kieran Yanner
Release Date
23 Apr 2021
TCGPlayer ID
235970
Arena ID
76477
Cardmarket ID
558022
MTGO ID
88645
PriceCharting ID
2187087
Scryfall ID
862fded6-e474-4b20-86d8-fd9af5f25b1a
Barcode
5634479445687
Larrikin Market Pricing
To understand its value, here's an international market summary. It seems to be selling around $0.50 – $0.62.
$0.50 – $0.62
View a source's price:
Market confidence
Low
Volume
Medium
Updated
14 Sep 2026
Strixhaven: School of Mages
Magic: The Gathering · EN · STX
| # | Name | Variants |
|---|---|---|
| 1 | Environmental Sciences | |
| 10 | Clever Lumimancer | |
| 100 | Explosive Welcome | |
| 101 | Fervent Mastery | |
| 102 | First Day of Class | |
| 103 | Fuming Effigy | |
| 104 | Grinning Ignus | |
| 105 | Hall Monitor | |
| 106 | Heated Debate | |
| 107 | Igneous Inspiration | |
| 108 | Illuminate History | |
| 109 | Illustrious Historian | |
| 11 | Combat Professor | |
| 110 | Mascot Interception | |
| 111 | Pigment Storm | |
| 112 | Pillardrop Warden | |
| 113 | Retriever Phoenix | |
| 114 | Start from Scratch | |
| 115 | Storm-Kiln Artist | |
| 116 | Sudden Breakthrough | |
| 117 | Tome Shredder | |
| 118 | Twinscroll Shaman | |
| 119 | Accomplished Alchemist | |
| 12 | Defend the Campus | |
| 120 | Basic Conjuration | |
| 121 | Bayou Groff | |
| 122 | Big Play | |
| 123 | Bookwurm | |
| 124 | Charge Through | |
| 125 | Containment Breach | |
| 126 | Devouring Tendrils | |
| 127 | Dragonsguard Elite | |
| 128 | Ecological Appreciation | |
| 129 | Emergent Sequence | |
| 13 | Detention Vortex | |
| 130 | Exponential Growth | |
| 131 | Field Trip | |
| 132 | Fortifying Draught | |
| 133 | Gnarled Professor | |
| 134 | Honor Troll | |
| 135 | Karok Wrangler | |
| 136 | Leyline Invocation | |
| 137 | Mage Duel | |
| 138 | Master Symmetrist | |
| 139 | Overgrown Arch | |
| 14 | Devastating Mastery | |
| 140 | Professor of Zoomancy | |
| 141 | Reckless Amplimancer | |
| 142 | Scurrid Colony | |
| 143 | Spined Karok | |
| 144 | Springmane Cervin | |
| 145 | Tangletrap | |
| 146 | Verdant Mastery | |
| 147 | Augmenter Pugilist // Echoing Equation | |
| 148 | Blex, Vexing Pest // Search for Blex | |
| 149 | Extus, Oriq Overlord // Awaken the Blood Avatar | |
| 15 | Dueling Coach | |
| 150 | Flamescroll Celebrant // Revel in Silence | |
| 151 | Jadzi, Oracle of Arcavios // Journey to the Oracle | |
| 152 | Kianne, Dean of Substance // Imbraham, Dean of Theory | |
| 153 | Mila, Crafty Companion // Lukka, Wayward Bonder | |
| 154 | Pestilent Cauldron // Restorative Burst | |
| 155 | Plargg, Dean of Chaos // Augusta, Dean of Order | |
| 156 | Rowan, Scholar of Sparks // Will, Scholar of Frost | |
| 157 | Selfless Glyphweaver // Deadly Vanity | |
| 158 | Shaile, Dean of Radiance // Embrose, Dean of Shadow | |
| 159 | Torrent Sculptor // Flamethrower Sonata | |
| 16 | Eager First-Year | |
| 160 | Uvilda, Dean of Perfection // Nassari, Dean of Expression | |
| 161 | Valentin, Dean of the Vein // Lisette, Dean of the Root | |
| 162 | Aether Helix | |
| 163 | Beledros Witherbloom | |
| 164 | Biomathematician | |
| 165 | Blade Historian | |
| 166 | Blood Researcher | |
| 167 | Blot Out the Sky | |
| 168 | Body of Research | |
| 169 | Closing Statement | |
| 17 | Elite Spellbinder | |
| 170 | Cram Session | |
| 171 | Creative Outburst | |
| 172 | Culling Ritual | |
| 173 | Culmination of Studies | |
| 174 | Daemogoth Titan | |
| 175 | Daemogoth Woe-Eater | |
| 176 | Deadly Brew | |
| 177 | Decisive Denial | |
| 178 | Dina, Soul Steeper | |
| 179 | Double Major | |
| 18 | Expel | |
| 180 | Dramatic Finale | |
| 181 | Elemental Expressionist | |
| 182 | Elemental Masterpiece | |
| 183 | Elemental Summoning | |
| 184 | Eureka Moment | |
| 185 | Exhilarating Elocution | |
| 186 | Expressive Iteration | |
| 187 | Fractal Summoning | |
| 188 | Fracture | |
| 189 | Galazeth Prismari | |
| 19 | Guiding Voice | |
| 190 | Golden Ratio | |
| 191 | Harness Infinity | |
| 192 | Hofri Ghostforge | |
| 193 | Humiliate | |
| 194 | Infuse with Vitality | |
| 195 | Inkling Summoning | |
| 196 | Kasmina, Enigma Sage | |
| 197 | Killian, Ink Duelist | |
| 198 | Lorehold Apprentice | |
| 199 | Lorehold Command | |
| 2 | Expanded Anatomy | |
| 20 | Leonin Lightscribe | |
| 200 | Lorehold Excavation | |
| 201 | Lorehold Pledgemage | |
| 202 | Maelstrom Muse | |
| 203 | Magma Opus | |
| 204 | Make Your Mark | |
| 205 | Manifestation Sage | |
| 206 | Moldering Karok | |
| 207 | Mortality Spear | |
| 208 | Needlethorn Drake | |
| 209 | Oggyar Battle-Seer | |
| 21 | Mavinda, Students' Advocate | |
| 210 | Owlin Shieldmage | |
| 211 | Pest Summoning | |
| 212 | Practical Research | |
| 213 | Prismari Apprentice | |
| 214 | Prismari Command | |
| 215 | Prismari Pledgemage | |
| 216 | Quandrix Apprentice | |
| 217 | Quandrix Command | |
| 218 | Quandrix Cultivator | |
| 219 | Quandrix Pledgemage | |
| 22 | Pilgrim of the Ages | |
| 220 | Quintorius, Field Historian | |
| 221 | Radiant Scrollwielder | |
| 222 | Reconstruct History | |
| 223 | Relic Sloth | |
| 224 | Returned Pastcaller | |
| 225 | Rip Apart | |
| 226 | Rise of Extus | |
| 227 | Rootha, Mercurial Artist | |
| 228 | Rushed Rebirth | |
| 229 | Shadewing Laureate | |
| 23 | Pillardrop Rescuer | |
| 230 | Shadrix Silverquill | |
| 231 | Silverquill Apprentice | |
| 232 | Silverquill Command | |
| 233 | Silverquill Pledgemage | |
| 234 | Silverquill Silencer | |
| 235 | Spectacle Mage | |
| 236 | Spirit Summoning | |
| 237 | Spiteful Squad | |
| 238 | Square Up | |
| 239 | Stonebound Mentor | |
| 24 | Professor of Symbology | |
| 240 | Tanazir Quandrix | |
| 241 | Teach by Example | |
| 242 | Tend the Pests | |
| 243 | Thrilling Discovery | |
| 244 | Vanishing Verse | |
| 245 | Velomachus Lorehold | |
| 246 | Venerable Warsinger | |
| 247 | Witherbloom Apprentice | |
| 248 | Witherbloom Command | |
| 249 | Witherbloom Pledgemage | |
| 25 | Reduce to Memory | |
| 250 | Zimone, Quandrix Prodigy | |
| 251 | Biblioplex Assistant | |
| 252 | Campus Guide | |
| 253 | Codie, Vociferous Codex | |
| 254 | Cogwork Archivist | |
| 255 | Excavated Wall | |
| 256 | Letter of Acceptance | |
| 257 | Reflective Golem | |
| 258 | Spell Satchel | |
| 259 | Strixhaven Stadium | |
| 26 | Secret Rendezvous | |
| 260 | Team Pennant | |
| 261 | Zephyr Boots | |
| 262 | Access Tunnel | |
| 263 | Archway Commons | |
| 264 | The Biblioplex | |
| 265 | Frostboil Snarl | |
| 266 | Furycalm Snarl | |
| 267 | Hall of Oracles | |
| 268 | Lorehold Campus | |
| 269 | Necroblossom Snarl | |
| 27 | Semester's End | |
| 270 | Prismari Campus | |
| 271 | Quandrix Campus | |
| 272 | Shineshadow Snarl | |
| 273 | Silverquill Campus | |
| 274 | Vineglimmer Snarl | |
| 275 | Witherbloom Campus | |
| 276 | Professor Onyx | |
| 277 | Mila, Crafty Companion // Lukka, Wayward Bonder | |
| 278 | Rowan, Scholar of Sparks // Will, Scholar of Frost | |
| 279 | Kasmina, Enigma Sage | |
| 28 | Show of Confidence | |
| 280 | Shadrix Silverquill | |
| 281 | Galazeth Prismari | |
| 282 | Beledros Witherbloom | |
| 283 | Velomachus Lorehold | |
| 284 | Tanazir Quandrix | |
| 285 | Mascot Exhibition | |
| 286 | Wandering Archaic // Explore the Vastlands | |
| 287 | Academic Probation | |
| 288 | Devastating Mastery | |
| 289 | Elite Spellbinder | |
| 29 | Sparring Regimen | |
| 290 | Leonin Lightscribe | |
| 291 | Mavinda, Students' Advocate | |
| 292 | Semester's End | |
| 293 | Sparring Regimen | |
| 294 | Strict Proctor | |
| 295 | Archmage Emeritus | |
| 296 | Dream Strix | |
| 297 | Ingenious Mastery | |
| 298 | Multiple Choice | |
| 299 | Teachings of the Archaics | |
| 3 | Introduction to Annihilation | |
| 30 | Star Pupil | |
| 300 | Tempted by the Oriq | |
| 301 | Baleful Mastery | |
| 302 | Callous Bloodmage | |
| 303 | Confront the Past | |
| 304 | Oriq Loremage | |
| 305 | Poet's Quill | |
| 306 | Sedgemoor Witch | |
| 307 | Conspiracy Theorist | |
| 308 | Crackle with Power | |
| 309 | Draconic Intervention | |
| 31 | Stonebinder's Familiar | |
| 310 | Efreet Flamepainter | |
| 311 | Fervent Mastery | |
| 312 | Illuminate History | |
| 313 | Retriever Phoenix | |
| 314 | Accomplished Alchemist | |
| 315 | Basic Conjuration | |
| 316 | Dragonsguard Elite | |
| 317 | Ecological Appreciation | |
| 318 | Exponential Growth | |
| 319 | Gnarled Professor | |
| 32 | Stonerise Spirit | |
| 320 | Verdant Mastery | |
| 321 | Augmenter Pugilist // Echoing Equation | |
| 322 | Blex, Vexing Pest // Search for Blex | |
| 323 | Extus, Oriq Overlord // Awaken the Blood Avatar | |
| 324 | Flamescroll Celebrant // Revel in Silence | |
| 325 | Jadzi, Oracle of Arcavios // Journey to the Oracle | |
| 326 | Kianne, Dean of Substance // Imbraham, Dean of Theory | |
| 327 | Pestilent Cauldron // Restorative Burst | |
| 328 | Plargg, Dean of Chaos // Augusta, Dean of Order | |
| 329 | Selfless Glyphweaver // Deadly Vanity | |
| 33 | Strict Proctor | |
| 33★ | Strict Proctor | |
| 330 | Shaile, Dean of Radiance // Embrose, Dean of Shadow | |
| 331 | Torrent Sculptor // Flamethrower Sonata | |
| 332 | Uvilda, Dean of Perfection // Nassari, Dean of Expression | |
| 333 | Valentin, Dean of the Vein // Lisette, Dean of the Root | |
| 334 | Blade Historian | |
| 335 | Blot Out the Sky | |
| 336 | Body of Research | |
| 337 | Culling Ritual | |
| 338 | Culmination of Studies | |
| 339 | Daemogoth Titan | |
| 34 | Study Break | |
| 340 | Double Major | |
| 341 | Dramatic Finale | |
| 342 | Elemental Expressionist | |
| 343 | Harness Infinity | |
| 344 | Hofri Ghostforge | |
| 345 | Lorehold Command | |
| 346 | Magma Opus | |
| 347 | Manifestation Sage | |
| 348 | Prismari Command | |
| 349 | Quandrix Command | |
| 35 | Thunderous Orator | |
| 350 | Radiant Scrollwielder | |
| 351 | Rushed Rebirth | |
| 352 | Silverquill Command | |
| 353 | Silverquill Silencer | |
| 354 | Vanishing Verse | |
| 355 | Venerable Warsinger | |
| 356 | Witherbloom Command | |
| 357 | Codie, Vociferous Codex | |
| 358 | Strixhaven Stadium | |
| 359 | The Biblioplex | |
| 36 | Arcane Subtraction | |
| 360 | Frostboil Snarl | |
| 361 | Furycalm Snarl | |
| 362 | Hall of Oracles | |
| 363 | Necroblossom Snarl | |
| 364 | Shineshadow Snarl | |
| 365 | Vineglimmer Snarl | |
| 366 | Plains | |
| 367 | Plains | |
| 368 | Island | |
| 369 | Island | |
| 37 | Archmage Emeritus | |
| 370 | Swamp | |
| 371 | Swamp | |
| 372 | Mountain | |
| 373 | Mountain | |
| 374 | Forest | |
| 375 | Forest | |
| 376 | Dragonsguard Elite | |
| 377 | Archmage Emeritus | |
| 378 | Fracture | |
| 379 | Expressive Iteration | |
| 38 | Burrog Befuddler | |
| 380 | Mortality Spear | |
| 381 | Rip Apart | |
| 382 | Decisive Denial | |
| 39 | Bury in Books | |
| 4 | Introduction to Prophecy | |
| 40 | Curate | |
| 41 | Divide by Zero | |
| 42 | Dream Strix | |
| 43 | Frost Trickster | |
| 44 | Ingenious Mastery | |
| 45 | Kelpie Guide | |
| 46 | Mentor's Guidance | |
| 47 | Mercurial Transformation | |
| 48 | Multiple Choice | |
| 49 | Pop Quiz | |
| 5 | Mascot Exhibition | |
| 50 | Reject | |
| 51 | Resculpt | |
| 52 | Serpentine Curve | |
| 53 | Snow Day | |
| 54 | Solve the Equation | |
| 55 | Soothsayer Adept | |
| 56 | Symmetry Sage | |
| 57 | Teachings of the Archaics | |
| 58 | Tempted by the Oriq | |
| 59 | Test of Talents | |
| 6 | Wandering Archaic // Explore the Vastlands | |
| 60 | Vortex Runner | |
| 61 | Waterfall Aerialist | |
| 62 | Wormhole Serpent | |
| 63 | Arrogant Poet | |
| 64 | Baleful Mastery | |
| 65 | Brackish Trudge | |
| 66 | Callous Bloodmage | |
| 67 | Confront the Past | |
| 68 | Crushing Disappointment | |
| 69 | Essence Infusion | |
| 7 | Academic Probation | |
| 70 | Eyetwitch | |
| 71 | Flunk | |
| 72 | Go Blank | |
| 73 | Hunt for Specimens | |
| 74 | Lash of Malice | |
| 75 | Leech Fanatic | |
| 76 | Mage Hunter | |
| 77 | Mage Hunters' Onslaught | |
| 78 | Necrotic Fumes | |
| 79 | Novice Dissector | |
| 8 | Ageless Guardian | |
| 80 | Oriq Loremage | |
| 81 | Plumb the Forbidden | |
| 82 | Poet's Quill | |
| 83 | Professor Onyx | |
| 84 | Professor's Warning | |
| 85 | Promising Duskmage | |
| 86 | Sedgemoor Witch | |
| 87 | Specter of the Fens | |
| 88 | Tenured Inkcaster | |
| 89 | Umbral Juke | |
| 9 | Beaming Defiance | |
| 90 | Unwilling Ingredient | |
| 91 | Academic Dispute | |
| 92 | Ardent Dustspeaker | |
| 93 | Blood Age General | |
| 94 | Conspiracy Theorist | |
| 95 | Crackle with Power | |
| 96 | Draconic Intervention | |
| 97 | Dragon's Approach | |
| 98 | Efreet Flamepainter | |
| 99 | Enthusiastic Study | |
| A-117 | A-Tome Shredder | |
| A-15 | A-Dueling Coach | |
| A-156 | A-Rowan, Scholar of Sparks // A-Will, Scholar of Frost | |
| A-202 | A-Maelstrom Muse | |
| A-240 | A-Tanazir Quandrix | |
| A-258 | A-Spell Satchel | |
| A-46 | A-Mentor's Guidance | |
| A-56 | A-Symmetry Sage | |
| A-88 | A-Tenured Inkcaster | |
| A-92 | A-Ardent Dustspeaker |
Currently out of stock
Price
Price unavailable
Larrikin Market Pricing
Selling around $0.50 – $0.62.
$0.50 – $0.62
Sources:
Market confidence
Low
Volume
Medium
Updated
14 Sep 2026
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