Medicine Runner + Mikaeus, the Unhallowed + Phyrexian Altar

WBG identity

Commander legal

The 3 combo pieces

• Medicine Runner
• Mikaeus, the Unhallowed
• Phyrexian Altar

How to execute it

1. Sacrifice Medicine Runner to make a mana of any color.
2. Return it with the undying trigger.
3. Using it's ability remove the +1/+1 counter from Medicine Runner.
4. Repeat.

What the combo produces

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