Incubation Druid + Umbral Mantle

G identity

Commander legal

The 2 combo pieces

• Incubation Druid
• Umbral Mantle

How to execute it

1. Activate Incubation Druid by tapping it, adding {3}.
2. Activate Incubation Druid by paying {3} and untapping it, giving it +2/+2 until end of turn.
3. Repeat.

What the combo produces

• Infinitely large creature until end of turn