Squee, the Immortal (Promo Pack) [Dominaria Promos] Light −3: Creatures you control gain

−3: Creatures you control gain trample and get +X/+X until end of turn

or Winged Beast-Type monster you control attacks a Defense Position monster

long united

Set: Dragons of Tarkir Prerelease Promos Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B} Creatures with power greater than Silumgar Assassin's power can't block it

also if it attacks

Squee, the Immortal (Promo Pack) [Dominaria Promos] Light −3: Creatures you control gainSet: Dominaria Promos Type: Legendary Creature Goblin Rarity: Rare Cost: {1}{R}{R} You may cast Squee, the Immortal from your graveyard or from exile. "You gotta be pretty smart to live long as me, but not being able to die helps."