Arixmethes, Slumbering Isle + Pemmin's Aura

Arixmethes, Slumbering Isle
Pemmin's Aura

Requires
All permanents on the battlefield. Arixmethes does not have summoning sickness. Arixmethes has no slumber counters on it. Pemmin's Aura attached to Arixmethes.
Steps
  1. Activate Arixmethes, adding ug
  2. Activate Pemmin's Aura, untapping Arixmethes
  3. Repeat
Results
Infinite green mana.