El Dorado Beast is a boss found on the 7th floor of Caina, in a group of two. They are accompanied by a Death Castle which will act as their support. After being defeated, each will drop a Shining Beard barter item.
El Dorado Beast can be found on Paths 7 and 8 of Yomotsu Hirasaka within the Midnight Channel. It is solely a physical attacker and can counter physicals from the party. After being defeated, it may drop a Merciless Cord. Selling 10 Merciless Cord at the TV extension of Daidara will unlock the Pieta ougi for Yukiko Amagi.
In Golden, El Dorado Beast attacks with an amplified Magarudyne as well as Deathbound. It can counter physical attacks. It nullifies the Dizzy status effect, can erect a magical barrier, and regenerates its health on every turn.