Prowling Geistcatcher, Emiel the Blessed, and Phyrexian Altar

Prerequisites

• Prowling Geistcatcher on the battlefield
• Emiel the Blessed on the battlefield
• Phyrexian Altar on the battlefield
• You control at least four other nontoken creatures

Steps

1. Activate Phyrexian Altar four times by sacrificing four other nontoken creatures, adding four mana of any color(s)
2. Prowling Geistcatcher triggers four times, exiling the sacrificed creatures from your graveyard
3. Activate Emiel by paying , blinking Prowling Geistcatcher
4. Prowling Geistcatcher leaves the battlefield, returning all creature cards exiled with it to the battlefield
5. Repeat

Results

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