Arixmethes, Slumbering Isle

Arixmethes, Slumbering Isle enters the battlefield tapped with five slumber
counters on it.
As long as Arixmethes has a slumber
counter on it, it's a land. (It's not a creature.)
Whenever you cast a spell you may remove
a slumber counter from Arixmethes.
{t}: Add {g}{u}.