Nim Deathmantle, Ashnod's Altar, and Glint-Sleeve Artisan

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Glint-Sleeve Artisan on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Glint-Sleeve Artisan, adding
2. When Glint-Sleeve Artisan dies, Nim Deathmantle triggers, causing you to pay to return Glint-Sleeve Artisan from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Glint-Sleeve Artisan enters the battlefield, its fabricate ability triggers, creating a 1/1 Servo artifact creature token
4. Activate Ashnod's Altar by sacrificing the Servo, adding
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers