From Emil Chronicle Wiki

Zereb is a level 23 monster.

[edit] Stats

Basic	Combat
Level 23 Experience 64 Job Experience 64 HP 190 SP 55 MP 0 Behavior Passive	Type Animal A.SPD 3.60 ATK 38 - 51 DEF 33 C.SPD 2.00 M.ATK 34 - 80 M.DEF 7
Properties Light(50%) Item Drops Mana Water, Carrot, Torn Magic Book, Unicorn Horn, Silver Medal, Jerev Stamp, Pegasus Skills  ??? Location Fareast Main Street & Snov Fork