Herd Baloth + Necrosynthesis + Phyrexian Altar

BG identity

Commander legal

The 3 combo pieces

• Herd Baloth
• Necrosynthesis
• Phyrexian Altar

What must be in place

Necrosynthesis attached to Herd Baloth.
You control another creature to sacrifice.

How to execute it

1. Activate Phyrexian Altar by sacrificing a creature, adding one mana of any color.
2. Necrosynthesis triggers, putting a +1/+1 counter on Herd Baloth.
3. Herd Baloth triggers, creating a 4/4 Beast creature token.
4. Activate Phyrexian Altar by sacrificing the Beast token, adding one mana of any color.
5. Repeat from step 2.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers