Defeat Lady Tethys

Lady Tethys is the chapter 2 boss. She has 2 attacks.

An electric orb that spawns at wherever you are. Easy to avoid if you keep moving.

A melee attack with a big red sword that hits all around her.

For this fight, cast projectiles over and over. This gets you free damage and interrupts her attacks. Get in close whenever you can and do jump XXXY. The throw at the end does a huge chunk of damage. She'll do her melee attack after being thrown, so run out of range and cast some more projectiles. Her melee attack can be parried, so always be prepared to parry. She can't be stunned by parries, but you'll avoid taking damage.