You control a nontoken artifact creature that can be cast using ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Steps
Activate Ashnod's Altar by sacrificing the nontoken artifact creature, adding ({C} magic symbol) ({C} magic symbol) .
The creature dies, triggering Enduring Renewal, returning the creature from your graveyard to your hand.
Imotekh's first ability triggers, creating two 2/2 Necron Warrior artifact creature tokens.
If necessary, activate Ashnod's Altar by sacrificing one or both Necron Warrior tokens, adding ({C} magic symbol) ({C} magic symbol) for each token sacrificed.
Cast the artifact creature by paying its mana cost.
Repeat.
Results
Infinite blinking of artifact creatures you control.