edhseer Commander synergy, explained
Sorcery
Mana cost: {3}{U}
Return target instant or sorcery card from your graveyard to your hand.
on-cast — brings a card back
Flashback {2}{R}
Causes: an instant leaves a graveyard, a sorcery leaves a graveyard.
Cares about: an instant in a graveyard, a sorcery in a graveyard.
an instant in a graveyard — 2 cards in the game can cause this (Mystic Retrieval is one).
an instant leaves a graveyard — 202 cards in the game can cause this (Mystic Retrieval is one).
anything leaves a graveyard — 2,503 cards in the game can cause this (Mystic Retrieval is one).
When Mystic Retrieval leaves a graveyard:
13 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 (Mystic Retrieval is one).
When Mystic Retrieval 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 (Mystic Retrieval is one).
When Mystic Retrieval is cast:
5 other cards care about it too. These are the ones with the most connections.