edhseer Commander synergy, explained
Creature — Rat
Mana cost: {5}{B}
When this creature enters, it deals X damage to target creature or planeswalker an opponent controls, where X is the number of creature cards in your graveyard.
triggered — deals damage
Causes: a creature deals noncombat damage, a planeswalker deals noncombat damage.
Cares about: a creature in a graveyard.
hits creature — 2,298 cards in the game can cause this (Ossuary Rats is one).
8 other cards care about it too. These are the ones with the most connections.
a Rat attacks — 162 cards in the game can cause this (Ossuary Rats is one).
a Rat enters the battlefield — 186 cards in the game can cause this (Ossuary Rats is one).
When Ossuary Rats enters:
1 other card cares about it too. These are the ones with the most connections.
put a creature into a graveyard — 2,769 cards in the game can cause this.
2,759 other cards cause it too. These are the ones with the most connections.
anything deals noncombat damage — 3,068 cards in the game can cause this (Ossuary Rats is one).
When Ossuary Rats deals noncombat damage:
36 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 (Ossuary Rats is one).
When Ossuary Rats attacks:
112 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 (Ossuary Rats is one).
When Ossuary Rats attacks:
181 other cards care about it too. These are the ones with the most connections.
a creature blocks — 17,934 cards in the game can cause this (Ossuary Rats is one).
When Ossuary Rats blocks:
22 other cards care about it too. These are the ones with the most connections.
a nontoken creature attacks — 17,934 cards in the game can cause this (Ossuary Rats is one).
When Ossuary Rats attacks:
a creature is dealt damage — 18,923 cards in the game can cause this (Ossuary Rats is one).
26 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 (Ossuary Rats is one).
When Ossuary Rats enters:
300 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,499 cards in the game can cause this (Ossuary Rats is one).
41 other cards care about it too. These are the ones with the most connections.