Avvokar, Passive Animator

Shroud
Whenever an elemental enters the battlefield
under your control, you gain 1 life for each
creature type among creatures you control.
{g}, {t}: Create a 1/1 green saproling creature
token.
{u}, {t}: Create a 1/1 blue elemental creature
token with hexproof.
{r}: Create a 1/1 red wyrmling creature token
with flying.