Baby Incisaur

The Incisaur is a T-Rex-like creature with some elements of rattlesnakes, orange eyes and a horn that resembles a rhinoceros beetle horn. It has large claws and teeth and appears to be drooling. Its skin is white with some light blue on the back, along with some light blue spikes, that becomes much larger when it becomes an adult. It's quadrupedal, despite its large hind legs. Also, its tail appears to look like that of a leopard gecko.

https://vignette.wikia.nocookie.net/mysingingmonsters/images/2/22/Incisaur_%28Young%29.png/revision/latest/scale-to-width-down/350?cb=20191118025718