Quicksilver Fountain

Artifact    (CMC:3)

At the beginning of each player's upkeep, that player puts a flood counter on target non-Island land he or she controls of his or her choice. That land is an Island for as long as it has a flood counter on it. At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them.

233 MRD • ENTrevor Hairsine

™ & © 1993—2003 Wizards of the Coast

Legal in: Modern,Mirrodin Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Quicksilver Fountain {3} Artifact At the beginning of each player's upkeep, that player puts a flood counter on target non-Island land he or she controls of his or her choice. That land is an Island for as long as it has a flood counter on it. At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them.

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12/1/2004
The land stays an Island until the flood counter is removed, even if Quicksilver Fountain leaves the battlefield.
12/1/2004
The timestamp of the land-type-changing ability is set when the triggered ability resolves (so each one has a different timestamp).

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Card Quicksilver Fountain is not on TCGPlayer.