Forestkeep Elder

Defender, reach, hexproof

Whenever a land enters the battlefield under your control, proliferate.
Token creatures you control get +1/+1 for each Forest you control.
If a land entering the battlefield causes a triggered ability
of a permanent you control to trigger, target nontoken creature you control gets +1/+1 for each Forest you control until the end of turn, this ability triggers only once each turn.
{t}: Add {g}{g}{g}{g}{g}.