Mwydyn, The World Crawler

Trample, Reach, Hexproof
Mwydyn, the World Crawler's power and
toughness are each equal to the number of Wurms
and Lands you control.
Lands and Wurms you control gain "{3},{t}:
Create a 5/5 Wurm Demigod creature token with Hexproof."
Whenever a Wurm you control dies, you may
search your library for a land or another Wurm card
and put it onto the battlefield tapped, then shuffle.