Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Gemstone Array's first ability twice by paying {4}, putting two charge counters on it.
Activate Gemstone Array's second ability twice by removing two charge counters from it, adding {G}{G}.
Repeat.

Infinite colored mana

Infinite colorless mana that can only be spent to activate abilities

Infinite charge counters on a permanent

Infinite +1/+1 counters on certain creatures

Bristly Bill, Spine Sower

Cryptic Trilobite

Gemstone Array

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Energy Refractor twice by paying {4}, adding {G}{G}.
Repeat.

Energy Refractor

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Urn of Godfire twice by paying {4}, adding {G}{G}.
Repeat.

Urn of Godfire

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Prismite twice by paying {4}, adding {G}{G}.
Repeat.

Prismite

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Stonework Packbeast twice by paying {4}, adding {G}{G}.
Repeat.

Stonework Packbeast

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Signpost Scarecrow twice by paying {4}, adding {G}{G}.
Repeat.

Signpost Scarecrow

Activate Bristly Bill by paying {3}{G}{G}, doubling the number of +1/+1 counters on creatures you control.
Activate Cryptic Trilobite four times by removing four +1/+1 counters from it, adding eight {C} that can only be spent to activate abilities.
Activate Crossroads Candleguide twice by paying {4}, adding {G}{G}.
Repeat.

Search Results