Blood Lust

Instant    (CMC:2)

Target creature gets +4/-4 until end of turn. If this reduces that creature's toughness to less than 1, the creature's toughness is 1.

5E • ENAnson Maddocks

™ & © 1993—1997 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

Blood Lust {1}{R} Instant If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

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11/1/2005
Has changed slightly in functionality, with the old continuous nature of the toughness reduction gone away; the toughness change remains static.  For example, if you have three Swamps and Nightmare on the battlefield and then cast Blood Lust on it, it will become 7/1.  If one of your Swamps is subsequently destroyed, your Nightmare will become 6/0 and be put in the graveyard.

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Card Blood Lust is not on TCGPlayer.