You see a minotaur idol.
Notes
It looks like a Glooth Powered Minotaur or a Moohtant with different colours. 12 Minotaur Statues will come to life in the form of Minotaur Idols after you enter The False God's room during the Cults of Tibia Quest.
Abilities
Melee (0-300)Damage Taken From Elements
Physical 
Death 
Holy 
Ice
Fire
Energy
Earth
Drown
Location
Minotaur Cult hideout near Mintwallin.
Behaviour
A minotaur idol attacks in melee range. A minotaur idol never retreats.
Strategy
Treat it as a strong melee creature and kill it fast before the other statues come to life.