Hydra Hatchling

Ward {1}
Whenever a forest enters the battlefield under
your control Hydra Hatchling gains +2/+2 until
end of turn. If you control 6 or more lands, put
two +1/+1 counters on Hydra Hatchling instead.
The cuteness only compounds the deadliness. If you
see one, run. The parent isn't far and the hatchling's
always hungry.