How much is Professor Onyx worth?

As of August 2026, Professor Onyx from Duskmourn: House of Horror Commander has a market value of €6.30. Track price trends and find local trades on Lootstack.

What set is Professor Onyx from?

Professor Onyx is from the Duskmourn: House of Horror Commander (DSC) expansion, part of the Magic: The Gathering trading card game.

What rarity is Professor Onyx?

Professor Onyx is a Mythic card from the Duskmourn: House of Horror Commander set in Magic: The Gathering.

What type of card is Professor Onyx?

Professor Onyx is a Legendary Planeswalker — Liliana from the Duskmourn: House of Horror Commander set in Magic: The Gathering.

Is Professor Onyx legal in Modern?

Professor Onyx is Legal in Modern. Check all format legalities for this Magic: The Gathering card on Lootstack.

Professor Onyx - Duskmourn: House of Horror Commander

Card Availability

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Legalities

LEGAL

Brawl

LEGAL

Commander

LEGAL

Duel

UNKNOWN

Future

UNKNOWN

Frontier

LEGAL

Historic

LEGAL

Legacy

LEGAL

Modern

UNKNOWN

Oathbreaker

UNKNOWN

Pauper

UNKNOWN

Penny

LEGAL

Pioneer

UNKNOWN

Standard

LEGAL

Vintage

Foreign Versions

Available in:

Rules & Rulings

4/16/2021

If an effect creates a copy of an instant or sorcery spell, this will also cause the magecraft ability to trigger.

4/16/2021

For Professor Onyx's last loyalty ability, "this process" is the following: First, the next opponent in turn order may choose a card in hand without revealing it, then each other opponent in turn order does the same. Then all the chosen cards are revealed and discarded at the same time and each opponent who didn't discard a card (whether they chose not to or had an empty hand) loses 3 life. This all will happen seven times, for a maximum loss of 21 life per opponent.

4/16/2021

Some effects instruct you to copy an instant or sorcery card in a zone other than the stack. These copies do not cause magecraft abilities to trigger. However, most effects that do this also allow you to cast the copy, and casting the copy will cause magecraft abilities to trigger.

4/16/2021

For Professor Onyx's second loyalty ability, if an opponent has multiple creatures with the greatest power, that player choose which one to sacrifice. The next opponent in turn order chooses which creature they are sacrificing, then each other opponent in turn order does the same, knowing the choices made before them. Then all chosen creatures are sacrificed at the same time.

4/16/2021

If Professor Onyx seems familiar, it's probably because you've seen this type of planeswalker before.

4/16/2021

Each magecraft ability has a different effect, although they all have the same trigger condition, whenever you cast or copy an instant or sorcery spell.

4/16/2021

For example, if you control Archmage Emeritus and cast an instant or sorcery spell, Archmage Emeritus's magecraft ability will trigger and you will draw a card.

4/16/2021

If an effect creates multiple copies of an instant or sorcery spell, magecraft abilities trigger once for each copy created by the effect.