The Felirex is the largest true feline that inhabits the continent of Arcadia. To avoid competition with True Dragons and larger Theropods, they started hunting during the night and the early hours of dawn; while dragons rule the day, felines rule the night.

Felirex are both sapient and sentient creatures capable of using magic to aid them during hunts. While dragons normally rely on elemental spells, felines mostly use illusion and buff spells to help their stealth capabilities. The Felirex rely on this sort of magic the most out of all felines; they invested in reaching massive sizes to make use of giant prey (terrestrial griffins, several herbivorous dinosaurs, etc) and fend off potential competition, their natural ability to sneak suffered quite a bit from that, hence the use of magic.

The Felirex lead a solitary lifestyle and they value their privacy. If a human encounters one of them, the situation is… oddly enough, not dire. As long as the human (or elf, or any other humanoid) shows respect to it, the Felirex will briefly acknowledge their presence, and then move on, paying little attention to the smaller life form. With access to magic focused around illusions and the mind, these cats are capable of telepathic communication. However, it's not very likely that they will entertain the idea of talking to any random humanoid (they have better things to do).
Normal vocalizations of an average Felirex usually consist of growls, yowls, hisses, and purrs. The use of telepathy stems from the fact that they are, in fact, unable to talk in the same way as humans or dragons do.