Part of the information is retrieved from the card descriptions of the dragon cards.
Five cards share the name Matimilopeotryx, one for each Faction.
Among them, the arguably strongest of all the dragons, Matimilopeotryx, has the best out of all of abilities. It is considered the strongest due to stats, and the lore, if to be believed, is the first dragon. It has five different variations, one for each faction. It has the respective, albeit much more powerful, abilities of each of the most powerful dragons. He was the first of the dragons, and will be the last. He is one dragon of many aspects: white, green, red, black and bronze. The Father of Dragons buried a son (Desirhalic Reborn). Mourned a daughter (Sillikiatrix). Ignored and disowned his other sons (Raganash, Gormihaagos) only to be betrayed by the child he loved most (Cirrusaliosa). When he learned of his daughter's madness (Sillikiatrix), the Father of Dragons wept three tears that poisoned three seas (in reference to his Poison All 3). The Father of Dragons did not lose his son to war, but to rage, and a lie.(Raganash)
Matimilopeotryx can be roughly translated as Father of the Dragons.