Mary Read and Anne Bonny, Gilded Assault Cart, Xorn, and Psychic Frog

Prerequisites

• Mary Read and Anne Bonny on the battlefield
• Gilded Assault Cart in hand
• Xorn on the battlefield
• Psychic Frog on the battlefield

Steps

1. Activate Psychic Frog's first ability by discarding Gilded Assault Cart
2. Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens
3. Resolve the Psychic Frog ability, putting a +1/+1 counter on it
4. Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand
5. Repeat

Results

• Infinite +1/+1 counters on Psychic Frog
• Infinite self-discard triggers