Cast Electroduplicate by paying its mana cost, creating a token copy of Bellowing Aegisaur.
Activate a mana-producing permanent you control by tapping it, adding at least {G}.
Activate Wayta by paying {G} and tapping it, causing Cacophodon and the nontoken Bellowing Aegisaur to fight each other, with each only taking 1 damage due to Temple Altisaur.
Cacophodon and Bellowing Aegisaur each trigger twice.
Resolve all Bellowing Aegisaur triggers, putting two +1/+1 counters on each other creature you control.
Resolve both Cacophodon triggers, untapping the mana-producing permanent and Wayta.
Repeat from step 2, alternating between having the token and nontoken Bellowing Aegisaur fight Cacophodon.

Infinite +1/+1 counters

Wayta, Trainer Prodigy

Bellowing Aegisaur

Cacophodon

Temple Altisaur

Electroduplicate

Activate a mana-producing permanent you control by tapping it, adding at least {G}.
Activate Wayta by paying {G} 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 Flesh Duplicate to ensure neither dies due to lethal damage.

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