You control a permanent that can tap to produce at least ({G} magic symbol) .
Altered Ego on the battlefield as a copy of Bellowing Aegisaur.
Steps
Activate a mana-producing permanent you control by tapping it, adding at least ({G} magic symbol) .
Activate Wayta by paying ({G} magic symbol) and tapping it, causing Cacophodon and Bellowing Aegisaur to fight each other, with each only taking 1 damage due to Temple Altisaur.
Cacophodon and Bellowing Aegisaur trigger twice.
Resolve both Bellowing Aegisaur triggers, putting two +1/+1 counters on each creature you control.
Resolve both Cacophodon triggers, untapping the mana-producing permanent and Wayta.
Repeat from step 2, alternating between having Cacophodon fight Bellowing Aegisaur and Altered Ego to ensure neither dies due to lethal damage.