Vortex of Thunder

At the beginning of the end step, exile Vortex
of Thunder. Activate each of its abilities
only once.
{r}: Vortex of Thunder deals 3 damage to
any target.
{1}{r}: Exile the top three cards of your library.
You may cast them this turn.
{r}: Vortex of Thunder deals four damage to
target creature.
{1}{r}: Add {r}{r}{r}