Requires

Nim Deathmantle must be on the battlefield. Ashnod's Altar must be on the battlefield. Highspire Artisan must be on the battlefield. Mana needed:

Steps

1. Activate Ashnod's Altar by sacrificing Highspire Artisan, adding .
2. When Highspire Artisan dies, Nim Deathmantle triggers, causing you to pay to return Highspire Artisan from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3. When Highspire 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