Tiamat, Chromatic God

Tiamat, Chromatic God can't be countered.
Flying, Trample, Haste, Fear, Protection from
everything
{w}{w}: Exile target creature.
{u}{u}: Draw three cards.
{b}{b}: Return target creature from your graveyard
onto the battlefield.
{r}{r}: Tiamat deals 6 damage divided as you
choose among any number of targets.
{g}{g}: You gain 6 life.