Swords to Plowshares

Instant    (CMC:1)

Exile target creature. Its controller gains life equal to its power.

30 ME4 • ENJeff A. Menges

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Legal in: Ice Age Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

10/4/2004
If the creature has a negative power, the player does not lose life. It acts the same as if it had a power of zero.
10/1/2008
The amount of life that's gained is equal to the power of the targeted creature as it last existed on the battlefield.