Eternal Eagle appears on Paths 5 and 6 of Yomotsu Hirasaka within the Midnight Channel. It alternates between attacking physically and using Megidola. While not set as a weakness, it takes more damage than normal from physical attacks, but also has the Counterstrike skill to deter them. After being defeated, it may drop a Death Sentence. Selling 10 Death Sentences at the TV extension of Daidara will unlock the Judgement Boots for Chie Satonaka.
In Golden, Eternal Eagle will attack with Arm Chopper, and attempt to Fear a party member in order to use Ghastly Wail.