At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Akki Battle Squad with haste.
Declare another modified creature you control as an attacker.
Akki Battle Squad triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.

Infinite combat phases

Infinite creature tokens with haste

Infinite creature ETB

Infinite untap of modified creatures you control

Akki Battle Squad

Helm of the Host

Declare the creature with Sword of Hearth and Home attached as an attacker.
Akki Battle Squad triggers, untapping all modified creatures you control, and causing you to get an additional combat phase after this one.
Deal combat damage to an opponent using the creature with Sword of Hearth and Home attached.
Sword of Hearth and Home triggers, exiling Akki Battle Squad, then searching your library for a basic land card and exiling it, then putting the land and Akki Battle Squad onto the battlefield.
Repeat each combat phase.

Infinite combat damage

Infinite creature LTB

Put all basic lands from your library onto the battlefield

Sword of Hearth and Home

Declare another modified creature you control as an attacker.
Akki Battle Squad triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Activate Kiki-Jiki by tapping it, creating a token copy of Akki Battle Squad with haste.
Repeat each combat phase.

Kiki-Jiki, Mirror Breaker

At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Akki Battle Squad with haste.
Declare another modified creature you control as an attacker.
Akki Battle Squad triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.

Rionya, Fire Dancer

At the beginning of your combat phase, Irma triggers, causing it to become a copy of Akki Battle Squad and putting a +1/+1 counter on it.
Declare Irma as an attacker. Irma triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Repeat.

Infinite +1/+1 counters on a creature

Irma, Part-Time Mutant

Declare Brago as an attacker.
Akki Battle Squad triggers, untapping all modified creatures you control, and causing you to get an additional combat phase after this one.
Deal combat damage to an opponent using Brago.
Brago triggers, blinking Akki Battle Squad.
Repeat each combat phase.

Infinite blinking

Brago, King Eternal

Declare The Neutrinos as an attacker, triggering it and Akki Battle Squad.
Resolve the Akki Battle Squad trigger, causing you to untap all modified creatures you control and to get an combat phase after this one.
Resolve the Neutrinos trigger, blinking Akki Battle Squad and causing it to enter tapped and attacking.
Repeat each combat phase.

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Infinitely powerful creature until end of turn

The Neutrinos

During your combat phase, activate a modified creature you control by tapping it, adding at least {1}.
Activate Volrath by paying {1}, causing it to become a copy of Akki Battle Squad until your next turn.
Declare any modified creature you control as an attacker.
Volrath triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.

Combos with "Akki Battle Squad"