edhseer Commander synergy, explained
Sorcery
Mana cost: {X}{U}{B}
Target opponent chooses X cards from their hand. Look at those cards. You may cast a spell from among them without paying its mana cost.
on-cast —
Causes: cast a spell.
Cares about: nothing.
a spell is cast — 155 cards in the game can cause this (Extract Brain is one).
When a spell is cast thanks to Extract Brain:
452 other cards care about it too. These are the ones with the most connections.
a sorcery is cast — 3,720 cards in the game can cause this (Extract Brain is one).
When a spell is cast thanks to Extract Brain:
424 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Extract Brain is one).
When a spell is cast thanks to Extract Brain:
2 other cards care about it too. These are the ones with the most connections.