Faerun, Avatar of Spring

Faerun, Avatar of Spring enters the battlefield with a +1/+1 counter for each forest you control.
Landfall — Whenever a land enter the battlefield under your control Add a +1/+1 counter to Faerun, Avatar of Spring then you may have target land you control receive X +1/+1 counters and become a Elemental creature. It's still a land.
At your end step, remove a +1/+1 counter from every other land creature you control.