Knotvine Mystic, Nyxbloom Ancient, and Umbral Mantle

Prerequisites

• Knotvine Mystic on the battlefield
• Nyxbloom Ancient on the battlefield
• Umbral Mantle on the battlefield
• Knotvine Mystic does not have summoning sickness
• Umbral Mantle attached to Knotvine Mystic
• available

Steps

1. Activate Knotvine Mystic by paying and tapping it, adding
2. Activate Knotvine Mystic by paying and untapping it, giving it +2/+2 until end of turn
3. Repeat

Results

• Infinite green mana
• Infinitely large Knotvine Mystic until end of turn
• Infinite red mana
• Infinite white mana