Tiamat, Queen of Chaos

Flying, trample, indestructible
As an aditional cost to cast Tiamat, Queen of
Chaos, sacrifice creatures with a combined mana
cost including at least one of each color.
{2}{w}: Tap target creature
{2}{u}: Return target creature to its owner's hand.
{2}{b}: Target creature gets -2/-2 until end of turn.
{2}{r}: Tiamat deals 3 damage to any target
{2}{g}: Destroy target artifact or enchantment