Darth Vader, Palpatine's Slave

First strike, Deathtouch
Whenever Darth Vader, Palpatine's Slave enters the battlefield, attacks or blocks, it deals 5 damage to any target, and 3 damage to up to 2 more targets.
{t},{3}{b}{b}{b}{r}{r}{r}:Destroy target permanent,
It's owner loses life equal to the toughness of target permanent.If target opponent loses the game because
of damage dealt by this ability,you win the game.