Pitiless Plunderer, Builder's Talent, and Phyrexian Altar

Prerequisites

• Pitiless Plunderer on the battlefield
• Builder's Talent on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing the persist creature, adding one mana of any color
2. When the persist creature dies, its persist ability and Pitiless Plunderer trigger
3. Resolve the persist creature trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it
4. Resolve the Pitiless Plunderer ability, creating a Treasure token
5. When the Treasure token enters the battlefield, Builder's Talent's second ability triggers, putting a +1/+1 counter on the persist creature
6. Repeat

Results

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