Upon entering the 'Forest of Doom', proceed through the initial forested areas, battling the various plant and insect enemies. The 'Owl' sub-weapon is located in the upper-right section of the painting, in a secluded cave-like area. You'll need to navigate through several vertical shafts and platforming sections to reach it. Look for a hidden passage behind a waterfall or a breakable wall in a seemingly dead-end area. Once acquired, the 'Owl' sub-weapon allows Jonathan to glide for a short duration by holding the jump button after a double jump. This ability is essential for reaching many otherwise inaccessible areas both in this painting and the main castle.
