Release Trial Krasis

Riot (This creature enters the battlefield
with your choice of a +1/+1 counter or haste.)
{r}{1}:Adapt 1 (If this creature has no +1/+1
counters on it, put a +1/+1 counter on it.)
Whenever Release Trial Krasis attacks green
and blue instant and sorcery spells cost {1}
less to cast for each +1/+1 counter on
Release Trial Krasis.