First printed in Strixhaven: School of Mages (2021)

All 6 prints

Duskmourn: House of Horror Commander (DSC) #153, 2024
Magic Online Promos (PRM) #90088, 2021 (digital)
Strixhaven: School of Mages Promos (PSTX) #83p, 2021
Strixhaven: School of Mages Promos (PSTX) #83s, 2021
Strixhaven: School of Mages (STX) #276, 2021
Strixhaven: School of Mages (STX) #83, 2021

Professor Onyx

Legendary Planeswalker — Liliana

Magecraft — Whenever you cast or copy an instant or sorcery spell, each opponent loses 2 life and you gain 2 life.
+1: You lose 1 life. Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
−3: Each opponent sacrifices a creature with the greatest power among creatures that player controls.
−8: Each opponent may discard a card. If they don't, they lose 3 life. Repeat this process six more times.

MTGO price: 0.02 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).

In the last 30 days 0.6% of Commander decks played it (36 of 6150). Most played in K'rrik, Son of Yawgmoth.

Combos

4 combos from Commander Spellbook, the most popular first.

Infinite lifegain, Infinite lifegain triggers…: Chain of Smog + Professor Onyx
Infinite lifegain, Infinite lifegain triggers…: Fury Storm + Professor Onyx
Infinite lifegain, Infinite lifegain triggers…: Chain of Acid + Professor Onyx
Infinite lifegain triggers, Infinite lifeloss…: Guile + Professor Onyx + Temporal Extortion

Legality

Constructed

Standard Not legal
Pioneer Legal
Modern Legal
Legacy Legal
Vintage Legal
Pauper Not legal
Future Standard Not legal
Historic Legal
Timeless Legal
Alchemy Not legal
Penny Dreadful Not legal
Premodern Not legal
Old School 93/94 Not legal

Singleton

Gladiator Legal

Commander formats

Commander Legal
Duel Commander Legal
Pauper Commander Not legal
PreDH Not legal
Tiny Leaders Not legal
Oathbreaker Legal
Brawl Legal
Standard Brawl Not legal
Competitive Brawl Legal

In tournament decks of the last 30 days

Meta: share of the archetype in the format
Play it: decks of the archetype that play this card
Together: decks with this card that also play the other one (main deck)
Lift: how much more often than chance: 1 = unrelated, above 1 = played together on purpose

Commander Other periods →

In 36 of 6150 decks (0.6%).

Share of decks

0.6%

▼ 0.2 vs previous 30 days

Weekly, last 90 days

Decks

36 main, 0 sideboard

Avg. copies

1.0

in the main deck

Win rate

27%

6 top 8 (challenges only)

Archetypes by metagame share

Archetype	Meta	Play it
K'rrik, Son of Yawgmoth	0.8%	8%
Rowan, Scion of War	0.7%	10%
Norman Osborn	0.3%	5%
Gwenom, Remorseless	0.3%	78%
Doctor Doom, Unrivaled	0.1%	20%
Rograkh, Son of Rohgahh + Tevesh Szat, Doom of Fools	0.1%	60%
Old Stickfingers	0.0%	67%
Sheoldred, the Apocalypse	0.0%	33%

Played together with

Card	Together	Lift
Dark Ritual	100%	2.5
Vampiric Tutor	97%	2.0
Mana Vault	97%	1.1
Lotus Petal	97%	1.1
Sol Ring	97%	1.0
Demonic Tutor	94%	2.0
Ancient Tomb	94%	1.1
Chrome Mox	94%	1.0
Gemstone Caverns	94%	1.0
Chain of Smog	92%	55.3

Best win rate

Deck	Record
Gwenom, Remorseless 🎀Melissa\|Sparky’sGaming ⚡️ in TITANS OF THE UNDERGROUND FNM LAST CHANCE QUALIFIER	3-2 60%
Gwenom, Remorseless Donna Pulley in The CEDH Witching Hour	3-4 43%
Gwenom, Remorseless 🎀Melissa\|Sparky’sGaming ⚡️ in Spells and Scares CEDH Tournament	2-4 33%
Gwenom, Remorseless 🎀Melissa\|Sparky’sGaming ⚡️ in BellsCon CEDH Tournament	2-4 33%
K'rrik, Son of Yawgmoth William Penrod in Eye of The Tiger (Lion) CEDH Tournament- Win a Lion's Eye Diamond	1-4 20%
Gwenom, Remorseless Willam Spickelmire in Gem State CEDH \| Ad Naus for a Cause!	1-4 20%
Old Stickfingers merel jossart in TAP THAT TUNDRA - EU CHAMPIONSHIP QUALIFIER	1-4 20%
Gwenom, Remorseless 🎀Melissa\|Sparky’sGaming ⚡️ in Deck Factory cEDH $1K event	1-4 20%

Challenges only: MTGO publishes only the 5-0 league decks.

Latest decks

Deck	Copies	Finish
Rograkh, Son of Rohgahh + Tevesh Szat, Doom of Fools Austin Dye, 25 Oct	1 main	#12 0-1
Gwenom, Remorseless Tyler Cooley, 24 Oct	1 main	#13 1-2
Tinybones, Trinket Thief greg stein, 24 Oct	1 main	#29 0-4
Gwenom, Remorseless Charles A Esparsen, 24 Oct	1 main	#20 1-1
K'rrik, Son of Yawgmoth Draven Chism, 24 Oct	1 main	#112 0-3
Rowan, Scion of War Jiří Stibor, 24 Oct	1 main	#18 1-2
Rowan, Scion of War JJ Yumul, 24 Oct	1 main	#23 1-3
K'rrik, Son of Yawgmoth William Penrod, 18 Oct	1 main	#33 1-4

No recent decks in: Pioneer, Modern, Legacy, Vintage, Duel Commander.