Valeira, Penitent Sorcerer

Whenever you cast an instant or sorcery spell,
create a 0/1 green plant creature token.
{r}, Sacrifice X plants: Deal X damage to any
target.
{u}, Sacrifice 3 plants: Exile target creature and
put 2 time counters on it. If it doesn't have
suspend, it gains suspend.
{g}, Sacrifice 3 plants: Create a 4/4 green
Whomping Willow legendary creature token with
reach and {t}: Deal 1 damage to any target.