Spirit of the Conqueror

Whenever Spirit of the Conqueror deals combat
damage to a player or planeswalker, you may
exile target nonland permanent that player
controls. For as long as that card remains exiled,
you may cast it without paying its mana cost.
{r}{w}{u}, {t}: Gain control of target creature until
end of turn. Untap it. It gains haste until end of
turn. Activate this ability only if you control
another nonland permanent.