edhseer Commander synergy, explained
Sorcery
Mana cost: {3}{R}
Untap target creature. After this main phase, there is an additional combat phase followed by an additional main phase.
on-cast — untaps a permanent
on-cast — takes an extra combat
Flashback {2}{R}
Causes: untap a creature.
Cares about: nothing.
a creature untaps — 519 cards in the game can cause this (Seize the Day is one).
a sorcery is cast — 3,720 cards in the game can cause this (Seize the Day is one).
When Seize the Day 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 (Seize the Day is one).
When Seize the Day is cast:
5 other cards care about it too. These are the ones with the most connections.