Earth Eater Hydra

When Earth Eater Hydra enters the battlfield, sacrifice X lands, then put X
+1/+1 counters on Earth Eater Hydra.
You may play land cards from your graveyard.
Whenever a land enters the battlefield from the graveyard, put a +1/+1 counter on Earth Eater
Hydra.
It feasts on your sustenance.