Arixmethes, Slumbering Isle

Arixmethes, Slumbering Isle enter 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}