Agatha's Soul Cauldron + Sephiroth, Planet's Heir + Walking Ballista

UB identity

Commander legal

The 3 combo pieces

• Agatha's Soul Cauldron
• Sephiroth, Planet's Heir
• Walking Ballista

What must be in place

Sephiroth, Planet's Heir has a +1/+1 counter on it.

How to execute it

1. If needed, give Sephiroth deathtouch.
2. Activate Sephiroth using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to a creature an opponent controls and destroying it due to Sephiroth's deathtouch.
3. When the creature dies, Sephiroth triggers, putting a +1/+1 counter on it.
4. Repeat from step 2.

What the combo produces

• Destroy all creatures opponents control
• Destroy each creature that enters the battlefield under an opponent's control
• Lock