Professor Onyx
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.
About Professor Onyx in Brawl
Professor Onyx is a Black planeswalker legal as a commander in MTG Arena Historic Brawl. With Kiln you can forge a complete, rules-legal 100-card deck around Professor Onyx in one click, balanced on mana curve and organized by role (ramp, card draw, removal, threats), with every card verified against the real Arena pool so nothing illegal or made-up slips in.
New to the format? Read how to build a Brawl deck.
Frequently asked questions
What color identity is Professor Onyx?
Professor Onyx's color identity is Black. Every card in its Brawl deck must fall within that identity.
Is Professor Onyx legal as a Brawl commander?
Yes, Professor Onyx is a planeswalker legal to command in MTG Arena Historic Brawl.
How many cards are in a Professor Onyx Brawl deck?
Exactly 100: Professor Onyx as the commander plus 99 different singleton cards within its color identity.