Specimen Collector + Cackling Counterpart + Phyrexian Altar
Specimen Collector
Cackling Counterpart
Phyrexian Altar
Requires
Specimen Collector must be on the battlefield.
Cackling Counterpart must be in hand.
Phyrexian 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 Phyrexian Altar by sacrificing the nontoken Specimen Collector, adding one mana of any color.
- Specimen Collector dies, creating a token copy of the Specimen Collector token.
- Repeat from step 2.
Results
Infinite colored mana. Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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