Sephiria Bosses: All 6 Chapters and the Difficulty Curve

Sephiria's tower is six chapters deep, with more than ten unique bosses and over sixty distinct enemy types. The official description is explicit that the challenges grow across those six chapters — this is a curve, not a flat difficulty with reskins.

How the tower is structured

More than ten bosses across six chapters means some chapters hold more than one. That matters for planning: you cannot assume one boss per chapter and budget your resources accordingly.

What to prepare before a boss

Because Sephiria is a roguelite built on an inventory grid, boss preparation is not "bring a potion" — it is the state of your bag when you arrive.

1. Have your weapon tree committed. By the time you reach a chapter boss you should have been feeding one of the six weapon classes for the whole run.
2. Rearrange before you enter. Rearranging Artifacts is free between rooms and costly during a fight.
3. Know what your Tablets are empowering. A boss fight is where a badly-placed Artifact shows up as missing damage.

The difficulty curve

The escalation across six chapters is the reason early runs feel survivable and later ones do not. A build that carries chapter 1 on raw weapon upgrades will stall in the middle chapters, because that is where the inventory system starts being the deciding factor rather than a bonus.

If you are dying repeatedly at the same chapter, the fix is usually upstream: which upgrades you took two chapters earlier, not your execution in the fight itself.

Still to verify

Individual boss names, movesets, phase counts and per-chapter tactics are not yet confirmed and are deliberately absent from this page. We have the structural figures from the official feature list; the fight-by-fight detail needs hands-on verification, and publishing guesses about boss mechanics would be worse than publishing nothing.

This page will be replaced with per-boss detail pages as each fight is documented.