Pandemonium, Phyrexian Altar, and Soul Collector

Prerequisites

• Pandemonium on the battlefield
• Phyrexian Altar on the battlefield
• Soul Collector in hand
• available

Steps

1. Cast Soul Collector by paying
2. When Soul Collector enters the battlefield, Pandemonium triggers, causing Soul Collector to deal damage to itself equal to its power
3. Activate Phyrexian Altar by sacrificing Soul Collector, adding one mana of any color
4. When Soul Collector dies, it triggers, returning itself from your graveyard to the battlefield
5. Repeat from step 2

Results

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