Evala, the Dancemaster

Whenever an Art creature you control attacks
and isn't blocked, you may discard a card. If you
do, it gets +1/+0 until the end of turn and you
draw a card.
{r}{r}{w}: Compose 2. (Create a 2/2 colorless Art creature token with haste. Exile it at the beginning of
the next end step.)
"Dances aren't only pretty, they're deadly as well."