Activate Myr Welder using Worn Powerstone's ability by tapping it, adding {C}{C}
Activate Myr Welder using Staff of Domination's first ability by paying {1}, untapping it.
Repeat.

Infinite card draw

Infinite draw triggers

Infinite lifegain

Infinite lifegain triggers

Infinite colorless mana

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Myr Welder

Staff of Domination

Worn Powerstone

Activate Trazyn using Worn Powerstone's ability by tapping it, adding {C}{C}.
Activate Trazyn using Pili-Pala's ability by paying {2} and untapping it, adding one mana of any color.
Repeat.

Infinite colored mana

Trazyn the Infinite

Pili-Pala

Activate Trazyn using Worn Powerstone's ability by tapping it, adding {C}{C}.
Activate Trazyn using Staff of Domination's first ability by paying {1}, untapping it.
Repeat.

Activate Trazyn using Worn Powerstone's ability by tapping it, adding {C}{C}.
Activate Trazyn using Farmstead Gleaner's ability by paying {2} and untapping it, putting a +1/+1 counter on Trazyn.
Repeat.

Infinite +1/+1 counters on a creature

Farmstead Gleaner

Activate Worn Powerstone by tapping it, adding {C}{C}.
Activate Voltaic Key by paying {1} and tapping it, targeting Worn Powerstone.
Locus of Enlightenment triggers, copying Voltaic Key's ability, targeting Voltaic Key.
Resolve both Voltaic Key abilities, untapping it and Worn Powerstone.
Repeat.

Infinite untap of artifacts you control

Infinite mana artifacts you control can produce

Voltaic Key

The Enigma Jewel // Locus of Enlightenment

Activate Worn Powerstone by tapping it, adding {C}{C}.
Activate Pentavus's first ability by paying {1} and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
Activate Pentavus's second ability by paying {1} and sacrificing the Pentavite.
When the Pentavite dies, Dross Scorpion triggers, untapping Worn Powerstone.
Resolve the Pentavus ability, putting a +1/+1 counter on it.
Repeat.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Pentavus

Dross Scorpion

Activate Tezzeret's first loyalty ability by putting a loyalty counter on it, targeting Worn Powerstone and The Peregrine Dynamo.
Holding priority, activate Worn Powerstone by tapping it, adding {C}{C}.
Activate The Peregrine Dynamo by paying {1} and tapping it, copying Tezzeret's ability, targeting Worn Powerstone and The Peregrine Dynamo.
Resolve the copy of Tezzeret's ability, untapping Worn Powerstone and The Peregrine Dynamo.
Repeat from step 2.

Combos with "Worn Powerstone"