Activate Ashnod's Altar by sacrificing Weaponcraft Enthusiast, adding CC.
Weaponcraft Enthusiast dies, triggering Nim Deathmantle, causing you to pay 4 to return Weaponcraft Enthusiast from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Weaponcraft Enthusiast enters the battlefield, creating two 1/1 Servo creature tokens.
Activate Ashnod's Altar by sacrificing a Servo, adding CC.