edhseer Commander synergy, explained
Artifact
Mana cost: {3}
At the beginning of each player's upkeep, that player puts a flood counter on target non-Island land they control of their choice. That land is an Island for as long as it has a flood counter on it.
triggered — puts a counter on it
triggered — grants a keyword
At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them.
triggered —
Causes: put a counter on a land, remove a counter from anything.
Cares about: an upkeep.
an artifact is cast — 3,683 cards in the game can cause this (Quicksilver Fountain is one).
When Quicksilver Fountain is cast:
271 other cards care about it too. These are the ones with the most connections.
a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Quicksilver Fountain is one).
When Quicksilver Fountain enters:
anything gets a counter — 4,415 cards in the game can cause this (Quicksilver Fountain is one).
7 other cards care about it too. These are the ones with the most connections.
an artifact enters the battlefield — 4,643 cards in the game can cause this (Quicksilver Fountain is one).
When Quicksilver Fountain enters:
55 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 (Quicksilver Fountain is one).
When Quicksilver Fountain enters:
39 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Quicksilver Fountain is one).
When Quicksilver Fountain is cast:
10 other cards care about it too. These are the ones with the most connections.