Caves of Koilos

Land   

: Add one colorless mana to your mana pool. : Add or to your mana pool. Caves of Koilos deals 1 damage to you.

140 AP • ENJim Nelson

™ & © 1993—2001 Wizards of the Coast

Legal in: Modern,Invasion Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

Caves of Koilos Land {T}: Add {C} to your mana pool. {T}: Add {W} or {B} to your mana pool. Caves of Koilos deals 1 damage to you.

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View this MTG card on Gatherer

6/22/2015
The damage dealt to you is part of the second mana ability. It doesn’t use the stack and can’t be responded to.
6/22/2015
Like most lands, each land in this cycle is colorless. The damage dealt to you is dealt by a colorless source.

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Card Caves of Koilos is not on TCGPlayer.