Zelda Tears of the Kingdom Obsidian Frox
The Obsidian Frox is a massive frog-like boss enemy that's found in the Depths on Zelda Tears of the Kingdom. This creature boasts several mining nodes on its back, which are its weak spots. To gain access to these weak points, you can either shoot a bomb flower into its mouth or aim an arrow at its eye.
Once the Frox is temporarily incapacitated from being struck in the eye or swallowing a bomb flower, you can ascend its arms or tail to reach its back and access the mining nodes. For increased accuracy, homing items like a Keese Eye or an Aerocuda Eye can prove particularly effective in striking the Frox's eye.
Location: Slightly East of Katanim Lightroot in the North of the Depths