edhseer Commander synergy, explained
Sorcery
Mana cost: {X}{R}{R}
You may cast up to one target instant card and/or up to one target sorcery card from your graveyard each with mana value X or less without paying their mana costs. If a spell cast this way would be put into your graveyard, exile it instead. If X is 10 or more, copy each of those spells twice. You may choose new targets for the copies.
on-cast — brings a card back
on-cast — brings a card back
on-cast —
on-cast — copies a spell
Causes: cast an instant, cast a sorcery, an instant leaves a graveyard, a sorcery leaves a graveyard, exile a spell, a spell leaves the battlefield, copy a spell.
Cares about: a card in a graveyard, a sorcery in a graveyard.
a sorcery in a graveyard — 2 cards in the game can cause this (Finale of Promise is one).
2 other cards care about it too. These are the ones with the most connections.
a spell is copied — 122 cards in the game can cause this (Finale of Promise is one).
When Finale of Promise is copied:
an instant leaves a graveyard — 202 cards in the game can cause this (Finale of Promise is one).
anything is exiled — 2,497 cards in the game can cause this (Finale of Promise is one).
anything leaves a graveyard — 2,503 cards in the game can cause this (Finale of Promise is one).
When Finale of Promise leaves a graveyard:
13 other cards care about it too. These are the ones with the most connections.
a sorcery it makes cheaper to cast — 3,585 cards in the game can cause this.
3,584 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 (Finale of Promise is one).
When Finale of Promise is cast:
424 other cards care about it too. These are the ones with the most connections.
a card in a graveyard — 7,589 cards in the game can cause this (Finale of Promise is one).
7,579 other cards care about it too. These are the ones with the most connections.