Kami of Whispered Hopes, and Umbral Mantle

Prerequisites

• Kami of Whispered Hopes on the battlefield
• Umbral Mantle on the battlefield
• Umbral Mantle attached to Kami of Whispered Hopes
• Kami of Whispered Hopes does not have summoning sickness and has a power of at least three

Steps

1. Activate Kami of Whispered Hopes by tapping it, adding at least three mana of any color
2. Activate Kami of Whispered Hopes by paying and untapping it, giving itself +2/+2 until end of turn
3. Repeat

Results

• Infinite colored mana
• Infinitely large Kami of Whispered Hopes until end of turn