How it works
Prerequisites
- Umbral Mantle attached to Incubation Druid.
- Incubation Druid does not have summoning sickness.
- Incubation Druid has at least one +1/+1 counter on it.
Steps
- 1Activate Incubation Druid's first ability by tapping it, adding three mana of any color a land you control could produce.
- 2Kinnan triggers, adding one mana of the color produced by Incubation Druid.
- 3Activate Incubation Druid by paying and untapping it, giving itself +2/+2 until end of turn.
- 4Repeat.
- 5If you gain infinite and this way, you may activate Kinnan's ability an arbitraily large number of times.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?