Moritte of the Frost, and Phyrexian Altar

Prerequisites

• Moritte of the Frost on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Moritte of the Frost, adding one mana of any color
2. When Moritte of the Frost dies, it triggers its persist ability, returning itself to the battlefield as a copy of the creature with persist with two +1/+1 counters and one -1/-1 counter on it
3. Remove one +1/+1 counter and one -1/-1 counter from Moritte of the Frost as a state-based action
4. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers