Kesmera, Master Arms

Haste, vigilance
Whenever Kesmera, Master Arms attacks for the first time each turn, you may have it fight target tapped creature an opponent controls. If that creature dies, after this combat phase there is an additional combat phase.
{r}: Tap a target creature, deal 1 damage to it.
{w}: Untap a target creature, that creature gets +1/+1 until the end of the turn.