From Emil Chronicle Wiki

Onyx is a level 47 monster.

[edit] Stats

Basic	Combat
Level 47 Experience 410 Job Experience 495 HP 1,550 SP 300 MP 300 Behavior Passive	Type Element A.SPD 3.00 ATK 130 - 150 DEF 80 C.SPD 4.00 M.ATK 200 - 250 M.DEF 30
Properties Water(10%) Dark(20%) Item Drops Black Gunpowder, Metallic Stone5, Carrier Oil, Titanium Lump, Super Ice Stone Skills  ??? Location Light Tower (Main Floor 4F, Northwest Corridor)