Venti, Archon of Wild Wind

Knights you control have indestructible and flying

Creatures you control get +1/+1 for each colour
among creatures you control.

{w}{u}{b}{r}{g}, {t} - Gain control of up to X
creatures until end of turn, where X is the number
of colours among permanents you control. untap
those creatures, they gain haste until end of turn.