Umbral Mantle, and Karametra's Acolyte

Prerequisites

• Umbral Mantle on the battlefield
• Karametra's Acolyte on the battlefield
• undefined

Steps

1. Activate Karametra's Acolyte by tapping it, adding at least
2. Activate Karametra's Acolyte by paying and untapping it, giving it +2/+2 until end of turn
3. Repeat

Results

• Infinite power for a creature until end of turn
• Infinite green mana