Hytherion

Also referred to as the Beast of time, Hytherion is an creature to be feared by most. Though thankfully and non-sentient extradimensional beast, Hytherion feed on TIME ITSELF! Being responsible for the destruction of many timelines.

However, the Chronarchitect allows the Hytherion to do so, leading many to believe that he created him to destroy unstable timelines for him. Others believe him to be a Superweapon from a long gone Multiversal cluster, who evolved into a quantum entity.

His bones are made of Alternium.

History:

Many possible origins for the Hytherion are speculated, from an evolved living superweapon from a long destroyed Multiversal cluster to being a creation of the Chronarchitect. However it’s agreed that he existed from the time of the old realms.

At somepoint it fought Logos prime, which Logos made many references too while with the Predators when he met them formerly[Terror in the skies!]The creature also ended up fighting Brail, Grax-treds and Jackknife so it couldn't eat Brail dimension[Transformers V Gobots]

the Hytherion was mentioned in "The cosmic Continuum" Baron Karza wrote[The Cosmic Continuum]

Notes:

He’s obviously based on the Hytherion

While his second possible origins is a reference to his canon origins, the first one about him being created by the Chronarchitect may be closer to the truth.