edhseer Commander synergy, explained
Sorcery
Mana cost: {6}{U}{U}{U}
Delve
static —
Target opponent mills nine cards, then you may cast an instant or sorcery spell from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.
on-cast — mills a card
on-cast — brings a card back
on-cast —
Causes: mill a card, cast an instant, cast a sorcery, an instant leaves a graveyard, a sorcery leaves a graveyard, exile a spell, a spell leaves the battlefield.
Cares about: an instant in a graveyard, a sorcery in a graveyard, a card in a graveyard.
an instant in a graveyard — 2 cards in the game can cause this (Sorcerous Squall is one).
an instant leaves a graveyard — 202 cards in the game can cause this (Sorcerous Squall is one).
a card is milled — 772 cards in the game can cause this (Sorcerous Squall is one).
anything is exiled — 2,497 cards in the game can cause this (Sorcerous Squall is one).
anything leaves a graveyard — 2,503 cards in the game can cause this (Sorcerous Squall is one).
When Sorcerous Squall 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.
3,578 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 (Sorcerous Squall is one).
When Sorcerous Squall is cast:
424 other cards care about it too. These are the ones with the most connections.