Activate Arlinn's loyalty ability by removing two loyalty counters from it, creating a 2/2 Wolf creature token that enters the battlefield with a +1/+1 counter on it.
Activate Xavier Sal's first ability by tapping it and removing the +1/+1 counter from the Wolf token, creating a copy of the Wolf token that enters the battlefield with a +1/+1 counter on it due to Arlinn.
When the Wolf token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Repeat from step 2.

Infinite creature tokens

Infinite creature ETB

Infinite mana creatures you control can produce

Infinite untap of creatures

Xavier Sal, Infested Captain

Intruder Alarm

Arlinn, Voice of the Pack

Activate Liquimetal Torque's second ability by tapping it, causing Arlinn to become an artifact until end of turn.
Activate Vorel of the Hull Clade by paying {G}{U} and tapping it, doubling the number of counters on Arlinn.
Activate Arlinn by removing twelve loyalty counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Lock

Vorel of the Hull Clade

Ichormoon Gauntlet

Liquimetal Torque

Activate Liquimetal Coating by tapping it, causing Arlinn to become an artifact until end of turn.
Activate Vorel of the Hull Clade by paying {G}{U} and tapping it, doubling the number of counters on Arlinn.
Activate Arlinn by removing twelve loyalty counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Liquimetal Coating

Activate Vorel of the Hull Clade by paying {G}{U} and tapping it, doubling the number of counters on Arlinn.
Activate Arlinn by removing twelve loyalty counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Combos with "Arlinn, Voice of the Pack"