Incubation Druid + Kinnan, Bonder Prodigy + Umbral Mantle

GU identity

Commander legal

The 3 combo pieces

• Incubation Druid
• Kinnan, Bonder Prodigy
• Umbral Mantle

What must be in place

Umbral Mantle attached to Incubation Druid.
Incubation Druid does not have summoning sickness.
Incubation Druid has at least one +1/+1 counter on it.

How to execute it

1. Activate Incubation Druid's first ability by tapping it, adding three mana of any color a land you control could produce.
2. Kinnan triggers, adding one mana of the color produced by Incubation Druid.
3. Activate Incubation Druid by paying {3} and untapping it, giving itself +2/+2 until end of turn.
4. Repeat.
5. If you gain infinite {U} and {G} this way, you may activate Kinnan's ability an arbitraily large number of times.

What the combo produces

• Infinite mana creatures you control can produce
• Infinite mana lands you control can produce
• Infinite untap of creatures you control
• Infinitely large creature until end of turn
• Put most creature cards from your library onto the battlefield