edhseer Commander synergy, explained
Sorcery
Mana cost: {1}{U}{B}
Exile all opponents' graveyards. You may cast spells from among those cards this turn, and mana of any type can be spent to cast them.
on-cast — brings a card back
on-cast —
At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards.
Exile Mnemonic Betrayal.
on-cast —
Causes: exile a card, anything leaves a graveyard, cast a spell.
Cares about: a card in a graveyard.
a spell is cast — 155 cards in the game can cause this (Mnemonic Betrayal is one).
When Mnemonic Betrayal is cast:
452 other cards care about it too. These are the ones with the most connections.
anything is exiled — 2,497 cards in the game can cause this (Mnemonic Betrayal is one).
a sorcery it makes cheaper to cast — 3,585 cards in the game can cause this.
3,578 other cards cause it too. These are the ones with the most connections.
a sorcery is cast — 3,720 cards in the game can cause this (Mnemonic Betrayal is one).
When Mnemonic Betrayal is cast:
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 (Mnemonic Betrayal is one).
When Mnemonic Betrayal is cast:
2 other cards care about it too. These are the ones with the most connections.