The Professor Onyx promo card from the 2021 Strixhaven: School of Mages Promos set features the Legendary Planeswalker Liliana as a mythic rare foil.
2021 • Magic: The Gathering • Strixhaven: School of Mages Promos
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| Condition | Value | Source | Trend | Price Details |
|---|---|---|---|---|
$6.44 | Guide Estimate | +0.6% | ||
Raw / Ungraded
TCGplayer Market (reference) · Guide Estimate evidence · captured Oct 31, 2026
This Magic: The Gathering card is Professor Onyx from the Strixhaven: School of Mages Promos set. Identified as card number 83p, it depicts the Legendary Planeswalker Liliana. The card carries a mana cost of {4}{B}{B} and has a mana value of 6. It is printed as a mythic rare with a foil finish. The artwork is by Kieran Yanner. This product includes the 83p promo version of Professor Onyx. ## What is the mana cost of Professor Onyx? Professor Onyx has a mana cost of {4}{B}{B}, requiring four generic mana and two black mana to cast. ## What type of card is Professor Onyx? Professor Onyx is a Legendary Planeswalker card with the subtypes Liliana and Magecraft ability. ## What is the rarity of the 83p Professor Onyx? The 83p promo version of Professor Onyx is a mythic rare card with a foil finish.
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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.
Notable collectible traits associated with this card profile.
FAQ
Professor Onyx has a mana cost of {4}{B}{B}, requiring four generic mana and two black mana to cast.
Professor Onyx is a Legendary Planeswalker card with the subtypes Liliana and Magecraft ability.
The 83p promo version of Professor Onyx is a mythic rare card with a foil finish.
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