Las’tiiagh, Devout Convert

Reach
Whenever you create one or more creature tokens, put that many +1/+1 counter on
Las'tiiegh, Devout Convert. If there is then
5 +1/+1 counters on her and she's a
Mutant, she loses the type Mutant, gains
the type Dryad and "Remove a +1/+1
counter: add {g} or {w}."