Coral Atoll

Land   

Coral Atoll comes into play tapped. When Coral Atoll comes into play, return an untapped island you control to owner's hand or bury Coral Atoll. : Add and one colorless mana to your mana pool.

VI • ENJohn Avon

™ & © 1993—1997 Wizards of the Coast

Legal in: Mirage Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

Coral Atoll Land Coral Atoll enters the battlefield tapped. When Coral Atoll enters the battlefield, sacrifice it unless you return an untapped Island you control to its owner's hand. {T}: Add {C}{U} to your mana pool.

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View this MTG card on Gatherer

2/1/2006
This has a triggered ability when it enters the battlefield, not a replacement effect, as previously worded.

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Card Coral Atoll is not on TCGPlayer.