Phyrexian Altar + Putrid Goblin + Stalwart Successor

BG identity

Commander legal

The 3 combo pieces

• Phyrexian Altar
• Putrid Goblin
• Stalwart Successor

How to execute it

1. Activate Phyrexian Altar by sacrificing Putrid Goblin
2. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Putrid Goblin enters, Stalwart Successor triggers, putting a +1/+1 counter on Putrid Goblin
4. Repeat.

What the combo produces

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