edhseer Commander synergy, explained
Instant
Mana cost: {U}{U}
Surveil 2, then choose an instant or sorcery card in your graveyard. You may cast it this turn. If that spell would be put into your graveyard, exile it instead.
on-cast — surveils
on-cast — brings a card back
on-cast —
Causes: surveil, 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: a card in a graveyard.
an instant leaves a graveyard — 202 cards in the game can cause this (Mission Briefing is one).
you surveil — 233 cards in the game can cause this (Mission Briefing is one).
When Mission Briefing surveils:
5 other cards care about it too. These are the ones with the most connections.
anything is exiled — 2,497 cards in the game can cause this (Mission Briefing is one).
anything leaves a graveyard — 2,503 cards in the game can cause this (Mission Briefing is one).
When Mission Briefing 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 (Mission Briefing is one).
424 other cards care about it too. These are the ones with the most connections.