Persistent Constrictor + Phyrexian Altar + Stalwart Successor

BG identity

Commander legal

The 3 combo pieces

• Persistent Constrictor
• Phyrexian Altar
• Stalwart Successor

How to execute it

1. Activate Phyrexian Altar 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. Repeat.

What the combo produces

• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers