From Emil Chronicle Wiki

Infinite Corridor Arcana King is a level 42 monster.

[edit] Stats

Basic	Combat
Level 42 Experience 110 Job Experience 110 HP 1,250 SP 1,000 MP 1,000 Behavior  ???	Type Magic Creature A.SPD 2.00 ATK 80 - 105 DEF 35 C.SPD -8.00 M.ATK 370 - 450 M.DEF 38
Properties Light(20%) Item Drops Arcana Ring XVI(Quest) Skills  ??? Location Infinite Corridor