Ghave, Guru of Spores, Ivy Lane Denizen, and Ashnod's Altar

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Ivy Lane Denizen on the battlefield
• Ashnod's Altar on the battlefield
• if you control no other creatures or otherwise available

Steps

1. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control
2. Holding priority, if you control another creature and have no mana available, activate Ashnod's Altar by sacrificing another creature, adding
3. Resolve the Ghave ability, creating a 1/1 Saproling creature token
4. When the Saproling enters the battlefield, Ivy Lane Denizen triggers, putting a +1/+1 counter on the Saproling
5. Repeat

Results

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