It's indeed the Great Star Priest!
Previously at Death Ridge, Rod encountered a Great Star Priest, and it kept chanting similar words.
For a monster to use human language, even if it's just meaningless repetition, is a very rare occurrence.
A true monster is a completely chaotic being, unable to produce any meaningful tone other than mad whispers. The few monsters with similar abilities only launch mental attacks; essentially, it's a product of your own soul's imagination, unrelated to the monster itself.
The Great Star Priest hiding deep underground in Death Ridge is such a peculiar existence, seemingly immersed in the powerful Illusion Realm of the Starry Kingdom, mistaking everyone for invading monsters, continuously summoning undead monsters to eliminate them.
Its power is extremely strong, summoning Undead Banshees which are at least Super Rank Second Tier monsters, able to lift Death Ridge formed by dozens of mountain peaks, and even summon meteors.
