Eon, Prismatic Core

Eon's power and toughness are each equal to the
number of multicolored permanents you control.
{x}{w}, {t}: Gain X life.
{x}{u}, {t}: Draw X cards.
{x}{b}, {t}: Proliferate X times.
{x}{r}, {t}: Eon deals X damage to any target.
{x}{g}, {t}: Creatures you control gain +X/+X
and trample until end of turn.
{w}{u}{b}{r}{g}: Untap Eon.