Jetmir, Nexus of Revels

Legendary Creature — Cat Demon {1}{R}{G}{W} 5/4

Creatures you control get +1/+0 and have vigilance as long as you control three or more creatures. Creatures you control also get +1/+0 and have trample as long as you control six or more creatures. Creatures you control also get +1/+0 and have double strike as long as you control nine or more creatures.