Lake of the Dead

Land   

If Lake of the Dead would enter the battlefield, sacrifice a Swamp instead. If you do, put Lake of the Dead onto the battlefield. If you don't, put it into its owner's graveyard. : Add to your mana pool. , Sacrifice a Swamp: Add to your mana pool.

177 ME1 • ENPete Venters

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

Oracle Text (click to copy):

10/4/2004
The tap and sacrifice counts as tapping the land for mana.
10/4/2004
You have to sacrifice a swamp before this card is put onto the battlefield. And you have to do this no matter how it is put onto the battlefield.