edhseer Commander synergy, explained
Creature — Ogre Shaman
Mana cost: {2}{R}
First strike
Whenever this creature attacks, you may cast target instant or sorcery card from your graveyard by paying {R}{R} in addition to its other costs. If that spell would be put into a graveyard, exile it instead.
triggered — brings a card back
triggered —
When you cast that spell, this creature gets +X/+0 until end of turn, where X is that spell's mana value.
triggered — gives +X/+0, where X is that spell's mana value
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.
Cares about: a spell is cast, an instant in a graveyard, a sorcery in a graveyard.
an instant in a graveyard — 2 cards in the game can cause this (Ogre Battlecaster is one).
an instant leaves a graveyard — 202 cards in the game can cause this (Ogre Battlecaster is one).
a Shaman creature enters the battlefield — 539 cards in the game can cause this (Ogre Battlecaster is one).
anything is exiled — 2,497 cards in the game can cause this (Ogre Battlecaster is one).
1 other card cares about it too. These are the ones with the most connections.
anything leaves a graveyard — 2,503 cards in the game can cause this (Ogre Battlecaster is one).
When an instant or sorcery leaves a graveyard thanks to Ogre Battlecaster:
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 (Ogre Battlecaster is one).
424 other cards care about it too. These are the ones with the most connections.
anything attacks — 17,934 cards in the game can cause this (Ogre Battlecaster is one).
127 other cards care about it too. These are the ones with the most connections.
a creature is cast — 18,010 cards in the game can cause this (Ogre Battlecaster is one).
90 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 19,800 cards in the game can cause this (Ogre Battlecaster is one).
323 other cards care about it too. These are the ones with the most connections.