Professor Onyx (PSTX-83p foil) is a Legendary Planeswalker — Liliana from the Strixhaven promos set. It has Magecraft that drains life whenever you cast or copy an instant or sorcery and several loyalty abilities including a looting-like +1 and a −3 board-control sacrifice effect. Its −8 ultimatum repeatedly forces opponents to discard or lose life, making it a finish-capable threat in spell-focused black decks.

Identity & printing

Name: Professor Onyx
Number: 83
Rarity: Mythic
Variant: Foil
Language code: EN

Type line & stats

Supertype: Legendary
Subtypes

Market prices (catalog API)

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Catalog pricing data as of 5 May 2026, 00:46

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Liliana

Types

Planeswalker

Catalog metadata

Imported from: Vendor Tools Public API catalog

Rules

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.

Set, artist & references

Artist: Kieran Yanner
Language: English
Set name: Strixhaven: School of Mages Promos
Game name: Magic The Gathering

In play

Abilities, attacks, weakness & resistance

More in this set

Other cards from Strixhaven: School of Mages Promos

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eBay prices

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Description

Professor Onyx (PSTX-83p foil) is a Legendary Planeswalker — Liliana from the Strixhaven promos set. It has Magecraft that drains life whenever you cast or copy an instant or sorcery and several loyalty abilities including a looting-like +1 and a −3 board-control sacrifice effect. Its −8 ultimatum repeatedly forces opponents to discard or lose life, making it a finish-capable threat in spell-focused black decks.

Catalog pricing data as of 5 May 2026, 00:46