Wayta, Trainer Prodigy, Bellowing Aegisaur, Cacophodon, Temple Altisaur, and Gigantoplasm

Prerequisites

• Wayta, Trainer Prodigy on the battlefield
• Bellowing Aegisaur on the battlefield
• Cacophodon on the battlefield
• Temple Altisaur on the battlefield
• Gigantoplasm on the battlefield
• You control a permanent that can tap to produce at least
• Gigantoplasm on the battlefield as a copy of Bellowing Aegisaur

Steps

1. Activate a mana-producing permanent you control by tapping it, adding at least
2. Activate Wayta by paying and tapping it, causing Cacophodon and Bellowing Aegisaur to fight each other, with each only taking 1 damage due to Temple Altisaur
3. Cacophodon and Bellowing Aegisaur trigger twice
4. Resolve both Bellowing Aegisaur triggers, putting two +1/+1 counters on each creature you control
5. Resolve both Cacophodon triggers, untapping the mana-producing permanent and Wayta
6. Repeat from step 2, alternating between having Cacophodon fight Bellowing Aegisaur and Gigantoplasm to ensure neither dies due to lethal damage

Results

• Infinite +1/+1 counters