Alice the Curious

Whenever 1 or more saprolings enter the battlefield, Investigate.
{r}, sacrifice a saproling: deal 1 damage to each
player.
{1}{w}, sacrifice a saproling: gain 1 life.
{2}{b}, sacrifice a saproling: each creature gets
-1/-1 until the end of the turn.
{3}{g}, sacrifice a saproling: each player puts a saproling unto the battlefield under their control.