Korra, Elemental Master

Prowess
{w}{w}: Korra, Elemental Master gains flying until end of turn.
{u}{u}: Tap target creature. It doesn't untap during its controller's next untap step.
{r}{r}: Korra, Elemental Master deals 4 damage to target creature or planeswalker.
{g}{g}: Destroy target artifact. If you do, Korra, Elemental Master gains trample until end of turn.