Witch-Maw Nephilim's first ability triggers, putting two +1/+1 counters on it.
Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
Activate Ashnod's Altar by sacrificing the Servo, adding CC.
When the Servo dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
Resolve Recruit the Worthy, creating a 1/1 Soldier creature token and returning Recruit the Worthy to your hand.
Activate Ashnod's Altar by sacrificing the Soldier, adding CC.
When the Soldier dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
Activate a Treasure by tapping and sacrificing it, adding .
Repeat.
Once you have infinite Treasure tokens, you may forego sacrificing the Servos and/or Soldiers.
This clever loop turns the self-recurring buyback spell Recruit the Worthy into an infinite token and mana engine by leveraging the persistent support of your board. Every time you cast the spell, Witch-Maw Nephilim grows larger with two +1/+1 counters, which in turn triggers Animation Module to effortlessly generate a Servo artifact creature token for a single mana. Ashnod's Altar and the newly created Soldier creature token work alongside the Servo to feed the sacrifice economy, while Pitiless Plunderer quietly watches creatures die to fund your mana needs with a steady stream of Treasure tokens.