edhseer Commander synergy, explained
Creature — Human Wizard
Mana cost: {B}{B}
Choose target opponent who has at least two fewer creature cards in their graveyard than you do as you activate this ability. Destroy target nonblack creature that player controls.
activated {B}, {T} —
Causes: a creature dies.
Cares about: nothing.
a nontoken Wizard enters the battlefield — 1,243 cards in the game can cause this (Keeper of the Dead is one).
a Wizard creature enters the battlefield — 1,264 cards in the game can cause this (Keeper of the Dead is one).
a creature in a graveyard — 2,769 cards in the game can cause this (Keeper of the Dead is one).
Keeper of the Dead puts cards into the graveyard that:
799 other cards care about it too. These are the ones with the most connections.
a nontoken creature dies — 2,769 cards in the game can cause this (Keeper of the Dead is one).
When a creature dies thanks to Keeper of the Dead:
60 other cards care about it too. These are the ones with the most connections.
a creature dies — 2,830 cards in the game can cause this (Keeper of the Dead is one).
When a creature dies thanks to Keeper of the Dead:
457 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 (Keeper of the Dead is one).
When Keeper of the Dead attacks:
146 other cards care about it too. These are the ones with the most connections.
a creature attacks — 17,934 cards in the game can cause this (Keeper of the Dead is one).
221 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 (Keeper of the Dead is one).
When Keeper of the Dead enters:
457 other cards care about it too. These are the ones with the most connections.