Give Cacophodon indestructible, if needed.
Activate the permanent that can deal damage by tapping it, dealing 1 damage to Cacophodon, triggering Cacophodon twice.
Resolve the first Cacophodon trigger, untapping the permanent that deals damage.
Holding priority, activate the permanent by tapping it, dealing 1 damage to any target.
Resolve the second Cacophodon trigger, untapping the permanent.
Repeat from step 2.

Infinite damage

Infinite mana permanents you control can produce

Infinite untap of permanents you control

Permanent tapping to deal damage to any target

Wayta, Trainer Prodigy

Cacophodon

Deal damage to Boros Reckoner.
Boros Reckoner triggers twice. Resolve the first trigger, dealing damage to any target.
Resolve the second Boros Reckoner trigger, dealing damage to itself.
Repeat from step 2.

Boros Reckoner

Give Cacophodon indestructible, if needed.
Activate a mana-producing permanent by tapping it, adding at least {G}.
Activate Wayta by paying {G}, causing Brash Taunter and Cacophodon to fight each other.
Brash Taunter and Cacophodon trigger twice.
Resolve both Brash Taunter triggers, dealing damage equal to twice the damage dealt to Brash Taunter to an opponent.
Resolve both Cacophodon triggers, untapping Wayta and the mana-producing permanent.
Repeat from step 2.

Brash Taunter

Give Cacophodon indestructible, if needed.
Activate a mana-producing permanent by tapping it, adding {G}.
Activate Wayta by paying {G} and tapping it, causing Siegehorn Ceratops and Cacophodon to fight each other.
Siegehorn Ceratops and Cacophodon trigger twice.
Resolve both Siegehorn Ceratops trigger, putting four +1/+1 counters on it.
Resolve both Cacophodon triggers, untapping Wayta and the mana-producing permanent.
Repeat from step 2.

Infinite +1/+1 counters on Siegehorn Ceratops

Siegehorn Ceratops

Give Cacophodon indestructible, if needed.
Activate a mana-producing permanent by tapping it, adding at least {G}.
Activate Wayta by paying {G}, causing a Polyraptor and Cacophodon to fight each other.
Polyraptor and Cacophodon trigger twice.
Resolve both Polyraptor triggers, creating two token copies of it.
Resolve both Cacophodon triggers, untapping Wayta and the mana-producing permanent.
Repeat from step 2.

Infinite creature tokens

Infinite death triggers

Infinite ETB

Infinite LTB

Polyraptor

Deal damage to the creature that has Blazing Sunsteel attached.
Blazing Susnteel triggers twice. Resolve the first trigger, dealing damage to any target.
Resolve the second Blazing Sunsteel trigger, dealing damage to the creature it is attached to.
Repeat from step 2.

Blazing Sunsteel

Deal exactly 1 or 2 damage to Boros Reckoner.
Rite of Passage and Boros Reckoner trigger twice.
Resolve both Rite of Passage triggers, putting two +1/+1 counters on Boros Reckoner.
Resolve the first Boros Recknoer trigger, dealing damage equal to the damage dealt to it to any target.
Resolve the second Boros Reckoner trigger, dealing damage equal to the damage dealt to it to itself.
Repeat from step 2.

Infinite +1/+1 counters on creatures you control with toughness 3 or greater

Rite of Passage

Deal exactly 1 or 2 damage to Spitemare.
Rite of Passage and Spitemare trigger twice.
Resolve both Rite of Passage triggers, putting two +1/+1 counters on Spitemare.
Resolve the first Spitemare trigger, dealing damage equal to the damage dealt to it to any target.
Resolve the second Spitemare trigger, dealing damage equal to the damage dealt to it to itself.
Repeat from step 2.

Spitemare

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

Bellowing Aegisaur

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 Progenitor Mimic to ensure neither dies due to lethal damage.

Combos with "Wayta, Trainer Prodigy"