Hexavus, and Ashnod's Altar

Prerequisites

• Hexavus on the battlefield
• Ashnod's Altar on the battlefield
• The persist creature does not have a -1/-1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing the persist creature, adding
2. When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Activate Hexavus' second ability by paying and removing the -1/-1 counter from the persist creature, putting a +1/+1 counter on Hexavus
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite +1/+1 counters on Hexavus