Activate Tezzeret's second loyalty ability by removing two loyalty counters from it, causing Aetherflux Reservoir to become an artifact creature until end of turn.
Give Aetherflux Reservoir lifelink.
Activate Aetherflux Reservoir by paying 50 life, dealing 50 damage to any target and causing you to gain 50 life.
Repeat step 3.

Infinite damage

Infinite lifegain triggers

Aetherflux Reservoir

Tezzeret, Betrayer of Flesh

Activate Tezzeret's second loyalty ability by removing two loyalty counters from it, causing Basalt Monolith to become an artifact creature.
Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
Activate Basalt Monolith's second ability by paying {1}, untapping it.
Repeat from step 2.

Infinite colorless mana

Basalt Monolith

Training Grounds

Animate Solar Array, if needed.
Cast Freed from the Real by paying its mana cost, attaching it to Solar Array.
Activate Solar Array by tapping it, adding {U} and causing the next artifact spell you cast this turn to have sunburst.
Activate Freed from the Real by paying {U}, untapping Solar Array.
Repeat from step 3 as desired.
Cast any artifact spell, triggering its sunburst ability an infinite number of times, either putting infinite +1/+1 counters on charge counters on the artifact.

Infinite +1/+1 counters on a creature

Infinite charge counters on artifacts you cast

Infinite +1/+1 counters on artifact creatures you cast

Solar Array

Freed from the Real

Animate Basalt Monolith using Tezzeret, Betrayer of Flesh.
Activate Basalt Monolith by tapping it, adding {C}{C}{C}.
Activate Voltaic Construct by paying {2}, untapping Basalt Monolith.
Repeat from step 2.

Infinite untap of artifact creatures you control

Voltaic Construct

Activate Tezzeret's second ability by removing two loyalty counters from it, causing Maskwood Nexus to become an artifact creature.
Activate any number of mana-producing creatures you control by tapping them, adding at least {3}.
Activate Maskwood Nexus by paying {3} and tapping it, creating a 2/2 Shapeshifter creature token.
When the Shapeshifter enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Repeat from step 2.
If creatures you control can tap to produce at least {4}, this combo nets infinite mana.

Infinite creature tokens

Infinite ETB

Infinite mana creatures you control can produce

Infinite untap of all creatures

Intruder Alarm

Maskwood Nexus

Activate Tezzeret's second loyalty ability by removing two loyalty counters from it, causing Basalt Monolith to become a 4/4 artifact creature until end of turn.
Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}{G}.
Activate Basalt Monolith's second ability by paying {3}, untapping it.
Repeat from step 2.

Infinite green mana

Leyline of Abundance

Animate Candelabra using Tezzeret, Betrayer of Flesh.
Cast Sakashima the Impostor by paying {2}{U}{U} plus commander tax, if applicable. Choose to have it enter the battlefield as a copy of Candelabra of Tawnos that is still named Sakashima the Impostor and legendary.
Activate Uthros, Titanic Godcore by paying {U} and tapping it, adding at least {U}{U}{U}{U}{U}
Activate Sakashima the Impostor by paying {2} and tapping it, untapping Minamo and Uthros, Titanic Godcore.
Activate Minamo's second ability by paying {U}, untapping Sakashima the Impostor.
Repeat from step 3.

Infinite mana lands you control can produce

Infinite blue mana

Infinite untap of lands you control

Candelabra of Tawnos

Sakashima the Impostor

Minamo, School at Water's Edge

Uthros, Titanic Godcore

Animate Spawning Pit using Tezzeret, Betrayer of Flesh.
Activate Spawning Pit's second ability by removing two charge counters from it, creating two creature tokens.
Activate Spawning Pit's first ability twice by sacrificing the creature tokens, putting two charge counters on it.
Repeat from step 2.

Infinite LTB

Infinite sacrifice triggers

Infinite death triggers

Ashaya, Soul of the Wild

Blossoming Tortoise

Spawning Pit

Stridehangar Automaton

Animate Spawning Pit using Tezzeret, Betrayer of Flesh
Activate Spawning Pit's second ability by removing two charge counters from it due to Blossoming Tortoise, creating a 2/2 Spawn artifact creature token.
Activate Spawning Pit's first ability by sacrificing the Spawn, putting two charge counters on it.
Repeat from step 2.

Pir, Imaginative Rascal

Combos with "Tezzeret, Betrayer of Flesh"