After escaping Euclid, your next destination is the White Forest, located to the east. This forest is known for its mystical properties and is home to the legendary Unicorn. The path to the White Forest is straightforward on the world map, but be prepared for encounters with new enemy types like Treants and Giant Bees. The White Forest itself is a small maze. Your goal is to find the Unicorn, which will require a specific item to interact with it. This item is usually obtained from an NPC in a nearby town or found within the forest itself.
Once you locate the Unicorn, a cutscene will trigger. You'll need to use the 'Pact Ring' (or similar item, depending on version) to gain its trust and obtain the Unicorn's Horn. This item is crucial for the next stage of your journey. The White Forest also contains several hidden chests, so explore thoroughly. Be aware that some enemies in this area can inflict status effects like Poison, so have Antidotes ready or rely on Mint's healing spells.