Specimen Collector, Everquill Phoenix, Phyrexian Altar, and Leyline of Transformation

Prerequisites

• Specimen Collector on the battlefield
• Everquill Phoenix in hand
• Phyrexian Altar on the battlefield
• Leyline of Transformation 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 Phyrexian Altar by sacrificing Specimen Collector, adding
4. When Specimen Collector dies, its second ability triggers, creating a copy of the Feather token
5. Activate a Feather by paying and sacrificing it, returning Specimen Collector from your graveyard to the battlefield
6. When Specimen Collector enters the battlefield, its first ability triggers, creating a 1/1 Squirrel and a 0/3 Crab creature token
7. Repeat from step 3

Results

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