edhseer Commander synergy, explained
Sorcery
Mana cost: {1}{B}{B}{B}
Bargain
Search your library for a card, exile it face down, then shuffle. If this spell was bargained, you may cast the exiled card without paying its mana cost if that spell's mana value is 4 or less. Put the exiled card into your hand if it wasn't cast this way.
on-cast — searches a library
on-cast —
on-cast —
on-cast —
Causes: search your library, exile a card, shuffle a library, cast anything.
Cares about: nothing.
anything is exiled — 2,497 cards in the game can cause this (Beseech the Mirror is one).
a sorcery is cast — 3,720 cards in the game can cause this (Beseech the Mirror is one).
When Beseech the Mirror 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 (Beseech the Mirror is one).
When Beseech the Mirror is cast:
5 other cards care about it too. These are the ones with the most connections.