Geralf's Messenger + Ghave, Guru of Spores + Phyrexian Altar

WBG identity

Commander legal

The 3 combo pieces

• Geralf's Messenger
• Ghave, Guru of Spores
• Phyrexian Altar

How to execute it

1. Activate Phyrexian Altar by sacrificing Geralf's Messenger, adding {1}.
2. Geralf's Messenger undying ability triggers, returning it to the battlefield with al +1/+1 counter on it.
3. Geralf's Messnger's ETB ability triggers, causing target opponent to lose 2 life.
4. Activate Ghave's first ability by paying {1} and removing a +1/+1 counter from Geralf's Messenger, creating a 1/1 Saproling creature token.
5. Repeat.

What the combo produces

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