Ardigayve, Eater of Worlds

Trample
Ardigayve, Eater of Worlds costs {1} less to
cast for each land in all graveyards.
Whenever Ardigayve, Eater of Worlds attacks, defending player sacrifices a permanent. If a land was sacrificed this way,
put a +1/+1 counter on Ardigayve, Eater of Worlds.