Pay {U} and tap Puppet Conjurer to create a 0/1 Homunculus.
The Homunculus enters untapping all creatures you control.
Repeat.

Infinite creature tokens with 0 power

Infinite creature ETB

Infinite untap of creatures you control

Infinite mana creatures you control can produce

Intruder Alarm

Puppet Conjurer

Activate Puppet's Conjurer by paying {1} and tapping it, creating a 0/1 Homunculus artifact creature token.
Activate Phyrexian Altar by sacrificing the Homunculus, adding {U}.
When the Homunculus dies, Dross Scorpion triggers, untapping Puppet's Conjurer.
Repeat.

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite death triggers

Dross Scorpion

Phyrexian Altar

Activate Puppet's Conjurer by paying {1} and tapping it, creating a 0/1 Homunculus artifact creature token.
Activate Krark-Clan Ironworks by sacrificing the Homunculus, adding {C}{C}.
When the Homunculus dies, Dross Scorpion triggers, untapping Puppet's Conjurer.
Repeat.

Infinite colored mana

Infinite colorless mana

Krark-Clan Ironworks

Mycosynth Lattice

Activate Puppet's Conjurer by paying {U} and tapping it, creating a 0/1 Homunculus artifact creature token.
Activate Krark-Clan Ironworks by sacrificing the Homunculus, adding {C}{C}.
When the Homunculus dies, Dross Scorpion triggers, untapping Puppet's Conjurer.
Activate Urn of Godfire by paying {2}, adding {U}.
Repeat.

Urn of Godfire

Combos with "Puppet Conjurer"