Ghave, Guru of Spores, Ashnod's Altar, Young Wolf, and Blood Artist

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Ashnod's Altar on the battlefield
• Young Wolf on the battlefield
• Blood Artist on the battlefield
• Young Wolf does not have a +1/+1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing Young Wolf, adding
2. Young Wolf's undying ability and Blood Artist trigger
3. Resolve the Young Wolf undying trigger, returning Young Wolf from your graveyard to the battlefield with a +1/+1 counter on it
4. Resolve the Blood Artist trigger, causing a player 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 Young Wolf, 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