Ghired, Mirror of the Wilds, Everquill Phoenix, Leyline of Transformation, and Phyrexian Altar

Prerequisites

• Ghired, Mirror of the Wilds on the battlefield
• Everquill Phoenix in hand
• Leyline of Transformation on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Everquill Phoenix for its mutate cost by paying , putting it under or over a non-Human creature you control
2. Everquill Phoenix triggers, creating a Feather artifact token
3. Activate Ghired by tapping it, creating a copy of the Feather token
4. Activate Phyrexian Altar by sacrificing Ghired, adding
5. Activate a Feather by paying and sacrificing it, returning Ghired from your graveyard to the battlefield
6. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers