The Incompetent Mage’s Infinite Regression

Ethan, a student at a magic school who is on the verge of expulsion, turns to black magic.
Ethan summoned with black magic the invaders of Terra, the mechanical god Demi.

In order to be recognized as a wizard,
to graduate from school safely,
and above all,
to survive, Ethan returns infinitely
and becomes a warlock.