Professor Onyx is a Legendary Planeswalker — Liliana card from the Strixhaven: School of Mages Promos set (code: PSTX). This Mythic Rare promo card features a Foil finish and was illustrated by Kieran Yanner. It has a mana cost of {4}{B}{B}, a mana value of 6, and colors of B. The card has a loyalty of 5 and a normal layout.
2021 • Magic: The Gathering • Strixhaven: School of Mages Promos
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| Condition | Value | Source | Trend | Price Details |
|---|---|---|---|---|
$17.74 | Guide Estimate | |||
Raw / Ungraded
TCGplayer Market (reference) · Guide Estimate evidence · captured Oct 11, 2026
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Each point is the last stored observation that day for this printing, condition, grader, autograph status and source. Gaps mean no observation; guide estimates and asking prices are not completed sales.Professor Onyx is a Magic: The Gathering trading card game card. It is a Legendary Planeswalker — Liliana with a mana cost of {4}{B}{B} and a mana value of 6. The card is colored B with a color identity of B. It has a loyalty of 5 and a normal layout. This card is part of the Strixhaven: School of Mages Promos set (set code: PSTX) and is identified as a promo. It is a Mythic Rare card with a Foil finish. The artist is Kieran Yanner. The card number is 83s.
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The catalog profile below summarizes the card identity, featured subject, and notable collectible traits.
The core identity of the card within the set.
The subject, team, league, and sport context tied to this card.
Featured
Professor Onyx
Game
Magic: The Gathering
Rarity, print treatment, and game-specific stats for this card.
Mythic Rare
Kieran Yanner
Card Stock
English
Foil
{4}{B}{B}
Legendary Planeswalker — Liliana
5
B
Abilities, attacks, oracle text, and flavor text printed on the card.
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.
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