Vhal, Candlekeep Researcher, and Umbral Mantle

Prerequisites

• Vhal, Candlekeep Researcher on the battlefield
• Umbral Mantle on the battlefield
• Umbral Mantle attached to Vhal
• Vhal has at least four toughness
• Vhal does not have summoning sickness

Steps

1. Activate Vhal by tapping it, adding at least
2. Activate Vhal by paying and untapping it, giving itself +2/+2 until end of turn
3. Repeat

Results

• Infinite colorless mana that cannot be spent to cast spells from your hand
• Infinitely large Vhal until end of turn