Belcusas the Thunderclap

Guardian Saint Beast: Belcusas the Thunderclap (守護聖獣 迅雷のベルクーセス Shugo Seijyū Jinrai no Berukūsesu) is an Arc of Embodiment Spell.

Description
An enormous, heavily-armored, and physically powerful creature that Rustyrose imagined into existance to fight on his behalf. It is strong enough to withstand Evergreen's Fairy Machine Gun: Leprechaun and Elfman's Beast Soul without sustaining any visible damage.