Llanowar Tribe, and Umbral Mantle

Prerequisites

• Llanowar Tribe on the battlefield
• Umbral Mantle on the battlefield
• Umbral Mantle attached to Llanowar Tribe
• Llanowar Tribe does not have summoning sickness

Steps

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

Results

• Infinitely large Llanowar Tribe until end of turn