Gornak said that he needed the material for the key to open the castle. Hunt the Lake Spirits and take 3 Spirit Crystals to him.
Step 1. Hunt Lake SpiritA Water Spirit guarding Idun’s Lake. Its beauty belies its dangerous nature.s, obtain Spirit Crystals and bring them to GornakA lunatic near Idun’s Lake to the northwest of Basfelt Village in Altgard. He mumbles incoherently.. (You need to collect: Spirit Crystal)