Activate Tevesh Szat's first loyalty ability by putting three loyalty counters on it, creating two 0/1 Thrull creature tokens.
Activate Ashnod's Altar twice by sacrificing the Thrulls, adding {C}{C}{C}{C}.
Activate The Chain Veil by paying {4} and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
Activate Teferi's first loyalty ability by putting a loyalty counter on it, untapping The Chain Veil and up to other other creature and/or land you control, and causing you to gain 2 life.
Repeat.

Infinite activations of most planeswalkers

Infinite death triggers

Infinite creature ETB

Infinite lifegain

Infinite lifegain triggers

Infinite creature LTB

Infinite mana permanents you control can produce

Infinite creature sacrifice triggers

Infinite untap of creatures and lands you control

Tevesh Szat, Doom of Fools

The Chain Veil

Ashnod's Altar

Teferi, Who Slows the Sunset

Activate Tevesh Szat's first loyalty ability by putting three loyalty counters on it, creating two 0/1 Thrull creature tokens.
Activate Ashnod's Altar twice by sacrificing the Thrulls, adding {C}{C}{C}{C}.
Activate The Chain Veil by paying {4} and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
Activate Ral Zarek's first loyalty ability by putting a loyalty counter on it, untapping The Chain Veil.
Repeat.

Ral Zarek

Activate Tevesh Szat's first loyalty ability by putting two loyalty counters on it, creating two 0/1 Thrull creature tokens.
When the Thrulls enter the battlefield, Intruder Alarm triggers twice.
Resolve the first trigger, untapping all creatures.
Activate Aphetto Alchemist by tapping it, untapping The Chain Veil.
Resolve the second Intruder Alarm trigger, untapping all creatures.
Activate Aphetto Alchemist by tapping it, untapping target artifact or creature.
Activate Ashnod's Altar twice by sacrificing the two Thrull tokens, adding {C}{C}{C}{C}.
Activate The Chain Veil by paying {4} and tapping it, allowing you an additional activation of your planeswalkers' loyalty abilities this turn.
Repeat.

Infinite mana artifacts you control can produce

Infinite mana creatures you control can produce

Infinite untap of creatures

Infinite untap of artifacts you control

Aphetto Alchemist

Intruder Alarm

Cast Tevesh Szat by paying {4}{B}, plus commander tax (if applicable).
Tevesh Szat enters the battlefield with eight loyalty counters due to Doubling Season.
Norn's Choirmaster triggers, proliferating, putting two loyalty counters on Tevesh Szat.
Activate Tevesh Szat's last loyalty ability by removing ten loyalty counters from it, choosing to put it into the command zone.
Resolve the ability, putting Tevesh Szat and all other commanders from the command zone onto the battlefield and gaining control of all commanders.
Norn's Choirmaster triggers at least once, proliferating at least once; choose to put exactly two loyalty counters on Tevesh Szat.
Repeat from step 4.

Gain control of all commanders

Infinite proliferate

Put all commanders from the command zone onto the battlefield

Sidar Kondo of Jamuraa

Norn's Choirmaster

Doubling Season

Cast Tevesh Szat by paying {4}{B}, plus commander tax (if applicable).
Tevesh Szat enters the battlefield with eight loyalty counters due to Vorinclex.
Norn's Choirmaster triggers, proliferating, putting two loyalty counters on Tevesh Szat.
Activate Tevesh Szat's last loyalty ability by removing ten loyalty counters from it, choosing to put it into the command zone.
Resolve the ability, putting Tevesh Szat and all other commanders from the command zone onto the battlefield and gaining control of all commanders.
Norn's Choirmaster triggers at least once, proliferating at least once; choose to put exactly two loyalty counters on Tevesh Szat.
Repeat from step 4.

Vorinclex, Monstrous Raider

Activate Tevesh Szat's first loyalty ability by putting three loyalty counters on it, creating two 0/1 Thrull creature tokens.
Activate Ashnod's Altar twice by sacrificing the Thrulls, adding {C}{C}{C}{C}.
Activate The Chain Veil by paying {4} and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
Activate Kiora by removing zero loyalty counters from it, untapping The Chain Veil.
Repeat.

Carth the Lion

Kiora, Behemoth Beckoner

Combos with "Tevesh Szat, Doom of Fools"