Kiki, Maw of Masks

Kiki, Maw of Masks is every color.

Whenever Kiki would leave the battlefield, you may pay 2
life. If you do, exile it instead. Until the end of your next
turn you may cast Kiki from exile without paying its mana
cost.

When Kiki enters or attacks, choose a color. Until end of
turn spells you cast of the chosen color cost {1} less to cast
and creatures you control of the chosen color get +1/+1 for
each other creature you control of the chosen color.