Mazirek, Kraul Death Priest + Phyrexian Altar + Putrid Goblin

BG identity

Commander legal

The 3 combo pieces

• Mazirek, Kraul Death Priest
• Phyrexian Altar
• Putrid Goblin

What must be in place

Putrid Goblin does not have a -1/-1 counter on it.

How to execute it

1. Activate Phyrexian Altar by sacrificing Putrid Goblin, adding one mana of any color.
2. Putrid Goblin dies, triggering its persist ability and Mazirek.
3. Resolve the Putrid Goblin trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
4. Resolve the Mazirek trigger, putting a +1/+1 counter on each creature you control.
5. Repeat.

What the combo produces

• Infinite +1/+1 counters on most creatures you control
• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers