Specimen Collector + Cackling Counterpart + Ashnod's Altar
Specimen Collector
Cackling Counterpart
Ashnod's Altar
Requires
Specimen Collector must be on the battlefield.
Cackling Counterpart must be in hand.
Ashnod's Altar must be on the battlefield.
Mana needed: 
Steps
- Cast Cackling Counterpart by paying , creating a token copy of Specimen Collector.
- The Specimen Collector token enters the battlefield, creating a 1/1 Squirrel and a 0/3 Crab creature token.
- Activate Ashnod's Altar by sacrificing the nontoken Specimen Collector, adding .
- Specimen Collector dies, creating a token copy of the Specimen Collector token.
- Repeat from step 2.
Results
Infinite colorless mana. Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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