Lingering Tormentor + Phyrexian Altar + Thran Vigil

B identity

Commander legal

The 3 combo pieces

• Lingering Tormentor
• Phyrexian Altar
• Thran Vigil

How to execute it

1. Activate Phyrexian Altar by sacrificing Lingering Tormentor.
2. When Lingering Tormentor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil triggers, putting a +1/+1 counter on Lingering Tormentor.
4. Repeat.

What the combo produces

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