Professor Onyx
Duskmourn: House of Horror Commander 153 • mythic
- Set
- Duskmourn: House of Horror Commander
- Collector number
- 153
- Rarity
- Mythic
- Mana cost
- 4 generic mana black mana black mana
- Type
- Planeswalker
- Colors
- Black
- Artist
- Kieran Yanner
- Market price
- $6.12
What it does
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.
Where you can play it
- StandardNot legal
- PioneerLegal
- ModernLegal
- LegacyLegal
- VintageLegal
- CommanderLegal
- PauperNot legal
- BrawlLegal
- HistoricLegal
- TimelessLegal
- Penny DreadfulNot legal
- OathbreakerLegal
Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC. Card text via Scryfall. Not approved or endorsed by Wizards. As of the last catalogue refresh.
Where to find one
Search for Professor Onyx on the marketplaces collectors use.
Listings from external marketplaces. We may earn a commission on qualifying purchases.
Where it came from
Professor Onyx, a potent planeswalker card, was released as part of the Duskmourn: House of Horror Commander set in 2024. As a thematic inclusion, the card serves to integrate the high-fantasy mechanics of Strixhaven: School of Mages into the horror-drenched aesthetic of the Duskmourn expansion. The design prioritizes a dark, academic tone consistent with the character's role as a mysterious mentor and mage.
The artwork for this iteration was created by Kieran Yanner, a prolific illustrator known for his dynamic character portraits within the Magic: The Gathering universe. Yanner sought to capture the character's command over arcane forces, utilizing a stark color palette to emphasize the atmospheric tension of the House of Horror setting. Upon release, the card was noted by players for its synergy with spell-heavy decks, reinforcing its status as a sought-after mythic rarity.
Generated by Pi, the collecto.rs collecting companion
Who's collecting this
Real cards collectors on collecto.rs who have this in their public collection.
About Professor Onyx
Professor Onyx is a card in the Magic: The Gathering catalog on collecto.rs. Duskmourn: House of Horror Commander 153 • mythic. Catalog data is sourced from Scryfall. No public cards collectors track this one yet — adding yours would make you the first on collecto.rs.
How many collectors track Professor Onyx on collecto.rs?
Professor Onyx doesn't have any public collectors on collecto.rs yet. Sign up to add it and become the first.
Can I track my own copy of Professor Onyx?
Yes. collecto.rs is free — sign up to log your card, upload photos, record condition, edition, and acquisition cost, and connect with other magic: the gathering collectors. Your collection stays private by default.
Where does the Professor Onyx catalog entry come from?
The catalog entry for Professor Onyx is sourced from Scryfall. Catalog-level facts stay consistent across every collector; your own data (condition, edition, acquisition notes) is yours.
Is collecto.rs cards tracking free?
Yes. Tracking your cards is free — no paid tier required to catalog items, upload photos, or share your collection.
Track every card you own
Free. Fun. Collection photos, notes, organization, value tracking, friends — all in one place.
Sign up free
