Burnice White

First strike, Menace, Haste

Whenever Burnice attacks, add {r}{r}{r}. Until end
of turn, you don't lose this mana as steps and phases end.

{r}: Burnice gets +1/+0 until end of turn. If this is
the third time this ability has resolved this turn, exile the top card of your library. Until the end of your next turn, you may play that card.