edhseer Commander synergy, explained
Creature — Devil
Mana cost: {B}{R}
Haste
Echo—Discard a card.
Causes: nothing.
Cares about: nothing.
a nontoken creature is sacrificed — 1,714 cards in the game can cause this (Rakdos Headliner is one).
When you sacrifice Rakdos Headliner:
a creature is sacrificed — 1,741 cards in the game can cause this (Rakdos Headliner is one).
When you sacrifice Rakdos Headliner:
19 other cards care about it too. These are the ones with the most connections.
a creature in a graveyard — 2,769 cards in the game can cause this (Rakdos Headliner is one).
When Rakdos Headliner is in the graveyard:
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 (Rakdos Headliner is one).
When Rakdos Headliner dies:
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 (Rakdos Headliner is one).
When Rakdos Headliner dies:
451 other cards care about it too. These are the ones with the most connections.
a creature leaves the battlefield — 4,238 cards in the game can cause this (Rakdos Headliner is one).
34 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 (Rakdos Headliner is one).
440 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 (Rakdos Headliner is one).
When Rakdos Headliner 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 (Rakdos Headliner is one).
219 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 (Rakdos Headliner 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 (Rakdos Headliner is one).
When Rakdos Headliner enters:
445 other cards care about it too. These are the ones with the most connections.