Ghave, Guru of Spores, Ashnod's Altar, Butcher Ghoul, and Zulaport Cutthroat

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Ashnod's Altar on the battlefield
• Butcher Ghoul on the battlefield
• Zulaport Cutthroat on the battlefield
• Butcher Ghoul does not have a +1/+1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing Butcher Ghoul, adding
2. Butcher Ghoul's undying ability and Zulaport Cutthroat trigger
3. Resolve the Butcher Ghoul undying trigger, returning Butcher Ghoul from your graveyard to the battlefield with a +1/+1 counter on it
4. Resolve the Zulaport Cutthroat trigger, causing each opponent to lose 1 life and you to gain 1 life
5. Activate Ghave's second ability by paying and removing a +1/+1 counter from Butcher Ghoul, creating a 1/1 Saproling creature token
6. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite +1/+1 counters
• Infinite sacrifice triggers
• Infinite death triggers