edhseer Commander synergy, explained
Sorcery
Mana cost: {3}{R}
Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.
on-cast — grants a keyword
Flashback {4}{R}
Causes: nothing.
Cares about: nothing.
a sorcery is cast — 3,720 cards in the game can cause this (Past in Flames is one).
When Past in Flames 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 (Past in Flames is one).
When Past in Flames is cast:
5 other cards care about it too. These are the ones with the most connections.