Walking Ballista + Unspeakable Symbol + Insult // Injury + The Rollercrusher Ride

Walking Ballista

Unspeakable Symbol

Insult // Injury

The Rollercrusher Ride

How it works

1. Cast Insult by paying 2, doubling all damage sources you control deal this turn.
2. Give Walking Ballista lifelink, if needed.
3. 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.
4. 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.
5. Repeat from step 3.