edhseer Commander synergy, explained
Creature — Serpent
Mana cost: {6}{U}{U}
When this creature enters, return each other creature you control to its owner's hand.
triggered — bounce
Causes: a creature leaves the battlefield.
Cares about: nothing.
anything leaves the battlefield — 1 card in the game can cause this (Denizen of the Deep is one).
hits creature — 2,298 cards in the game can cause this.
12 other cards care about it too. These are the ones with the most connections.
a nontoken creature leaves the battlefield — 4,133 cards in the game can cause this (Denizen of the Deep is one).
When a creature leaves the battlefield thanks to Denizen of the Deep:
a creature leaves the battlefield — 4,238 cards in the game can cause this (Denizen of the Deep is one).
21 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 (Denizen of the Deep is one).
When Denizen of the Deep 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 (Denizen of the Deep is one).
When Denizen of the Deep 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 (Denizen of the Deep is one).
When Denizen of the Deep blocks:
23 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 (Denizen of the Deep is one).
When Denizen of the Deep attacks:
1 other card cares about it too. These are the ones with the most connections.
a creature deals combat damage — 17,934 cards in the game can cause this (Denizen of the Deep is one).
196 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 (Denizen of the Deep is one).
When Denizen of the Deep enters:
299 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 (Denizen of the Deep is one).
42 other cards care about it too. These are the ones with the most connections.