Phyrexian Altar + Rendclaw Trow + Thran Vigil

BG identity

Commander legal

The 3 combo pieces

• Phyrexian Altar
• Rendclaw Trow
• Thran Vigil

How to execute it

1. Activate Phyrexian Altar by sacrificing Rendclaw Trow.
2. When Rendclaw Trow 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 Rendclaw Trow.
4. Repeat.

What the combo produces

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