Persistent Constrictor + Phantom Train + Stalwart Successor

BG identity

Commander legal

The 3 combo pieces

• Persistent Constrictor
• Phantom Train
• Stalwart Successor

How to execute it

1. Activate Phantom Train by sacrificing Persistent Constrictor
2. When Persistent Constrictor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Persistent Constrictor enters, Stalwart Successor triggers, putting a +1/+1 counter on Persistent Constrictor
4. Resolve the Phantom Train ability.
5. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers