The Menocht Loop

Ian Dunai is the most gifted decemancer of his generation, and he's been stuck in the same ten days for years — the final trial he cannot clear. Mastery was never the problem. The loop is hiding something, and escaping it is only the first arc.

Progression: death magic refined through infinite practice, then a wider world of tiers beyond the loop.

Reader fit: you want a time loop treated as a puzzle box by a protagonist who's already powerful, not becoming so.

Texture: cerebral, cool-toned, twisty.