Halo Fountain + Incubation Druid + Karn, the Great Creator

GW identity

Commander legal

The 3 combo pieces

What must be in place

Halo Fountain and Incubation Druid do not have summoning sickness.
Incubation Druid has at least one +1/+1 counter on it.

How to execute it

  1. Activate Karn's first loyalty ability by putting a loyalty counter on it, causing Halo Fountain to become an artifact creature until end of turn.
  2. Activate Incubation Druid's first ability by tapping it, adding {W}{W}{W}.
  3. Activate Halo Fountain's second ability by paying {W}{W}, tapping it and untapping it and Incubation Druid, causing you to draw a card.
  4. Repeat from step 2.

What the combo produces