Devoted Druid + Kwain, Itinerant Meddler + Light of Promise + Necrotic Ooze

GWUB identity

Commander legal

The 4 combo pieces

What must be in place

Light of Promise attached to Necrotic Ooze.
Necrotic Ooze does not have summoning sickness.

How to execute it

  1. Activate Necrotic Ooze using Kwain's ability by tapping it, allowing each player to draw a card and gain 1 life.
  2. Necrotic Ooze triggers, putting a +1/+1 counter on itself.
  3. Activate Necrotic Ooze using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
  4. Repeat.

What the combo produces