Sage, Nexus of Revels

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.
—
Actually Jetmir