Specimen Collector, Cackling Counterpart, and Ashnod's Altar

Prerequisites

• Specimen Collector on the battlefield
• Cackling Counterpart in hand
• Ashnod's Altar on the battlefield
• available

Steps

1. Cast Cackling Counterpart by paying , creating a token copy of Specimen Collector
2. The Specimen Collector token enters the battlefield, creating a 1/1 Squirrel and a 0/3 Crab creature token
3. Activate Ashnod's Altar by sacrificing the nontoken Specimen Collector, adding
4. Specimen Collector dies, creating a token copy of the Specimen Collector token
5. Repeat from step 2

Results

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