Collective Inferno + The Rollercrusher Ride + Unspeakable Symbol + Walking Ballista

BR identity

Commander legal

The 4 combo pieces

What must be in place

You have a way to give Walking Ballista lifelink.
Walking Ballista has at least two +1/+1 counters on it, or your life total is at least 4.
There are four or more card types among cards in your graveyard.

How to execute it

  1. Give Walking Ballista lifelink, if needed.
  2. If Walking Ballista has less than two +1/+1 counters on it, activate Unspeakable Symbol by paying 3 life, putting a +1/+1 counter on Walking Ballista.
  3. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 4 damage to an opponent or a permanent an opponent controls, and causing you to gain 4 life.
  4. Repeat from step 2.

What the combo produces