From the ruined Totus, head west on the world map. You'll encounter random battles with slightly stronger enemies like Wolves and Goblins. level up Cress a bit before reaching Euclid. Once you arrive, explore the town. Talk to NPCs to gather information and visit the item shop to stock up on Apple Gels and Life Bottles. Your objective is to find your uncle, Olson. He resides in a house in the northern part of town. After speaking with him, a series of events will lead you to Euclid Castle.
Inside Euclid Castle, you'll meet Mint, who will join your party. This dungeon introduces more complex layouts and stronger enemies like Knights and Archers. Navigate through the castle, solving minor switch puzzles and collecting treasure. Your ultimate goal is to reach the prison cells where Mint's mother is held. Be prepared for a boss fight at the end of this section. Ensure Cress has learned at least one or two Artes, such as 'Demon Fang', as they will be crucial for dealing damage.