Umbral Mantle, and Incubation Druid

Prerequisites

• Umbral Mantle on the battlefield
• Incubation Druid on the battlefield
• undefined

Steps

1. Activate Incubation Druid by tapping it, adding
2. Activate Incubation Druid 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