edhseer Commander synergy, explained
Creature — Nightmare Dragon
Mana cost: {3}{R}{R}{R}
Flying, trample
When this creature enters, exile all other permanents you control.
triggered —
When this creature leaves the battlefield, return the exiled cards to the battlefield under their owners' control.
triggered — blinks a permanent
Causes: exile a permanent, a permanent leaves the battlefield, put a permanent onto the battlefield.
Cares about: nothing.
anything leaves the battlefield — 1 card in the game can cause this (Worldgorger Dragon is one).
hits creature — 2,298 cards in the game can cause this.
10 other cards care about it too. These are the ones with the most connections.
a permanent is exiled — 69 cards in the game can cause this (Worldgorger Dragon is one).
a Nightmare enters the battlefield — 151 cards in the game can cause this (Worldgorger Dragon is one).
a permanent enters the battlefield — 152 cards in the game can cause this (Worldgorger Dragon is one).
When a permanent enters thanks to Worldgorger Dragon:
10 other cards care about it too. These are the ones with the most connections.
a nontoken permanent leaves the battlefield — 313 cards in the game can cause this (Worldgorger Dragon is one).
a permanent leaves the battlefield — 315 cards in the game can cause this (Worldgorger Dragon is one).
When a permanent leaves the battlefield thanks to Worldgorger Dragon:
a Dragon attacks — 474 cards in the game can cause this (Worldgorger Dragon is one).
When Worldgorger Dragon attacks:
a Dragon deals combat damage — 474 cards in the game can cause this (Worldgorger Dragon is one).
When Worldgorger Dragon deals combat damage:
a nontoken Dragon enters the battlefield — 484 cards in the game can cause this (Worldgorger Dragon is one).
When Worldgorger Dragon enters:
a Dragon enters the battlefield — 524 cards in the game can cause this (Worldgorger Dragon is one).
When Worldgorger Dragon enters:
4 other cards care about it too. These are the ones with the most connections.
anything is exiled — 2,497 cards in the game can cause this (Worldgorger Dragon is one).
anything attacks — 17,934 cards in the game can cause this (Worldgorger Dragon is one).
When Worldgorger Dragon attacks:
118 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 (Worldgorger Dragon is one).
When Worldgorger Dragon attacks:
189 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 (Worldgorger Dragon is one).
303 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 (Worldgorger Dragon is one).
40 other cards care about it too. These are the ones with the most connections.