The creature doesn't react to the coinage at all, nor Cicivexa's motions, or at least he's pretty sure it doesn't. The mysterious figure turns at Cicivexa's question with a short grunt.
"Huh? The Dusks? Yes, unfortunately. Trespassers can't easily sense their presence, or that of their kin, because they do not exist."
He reaches out and swipes a backhand at the one giving Cicivexa sass, causing its body to smear like watercolors where he hits before it vanishes in a burst of cracks, white dust, and intangible thorns. He says something in a guttural language and the other three give him a look before sort of slinking down into similar cracks in the ground, kicking up more white dust and intangible thorns.
"The Herald is cunning, no doubt it promised anything to whoever holds the amulet. The Priest took it from the corpse of the Summoner, but I searched his residence and found nothing. Until we find it we may be able to bait out the creature and trap it. It's drawn to any sources of energy, power, souls, magic, it needs to feed on them to call its liege. Weaken it again and..."
He reaches into his coat again and withdraws a roughly fist-sized stone octahedron. Impossibly intricate patterns are carved on each face and anyone with a sense for magic can feel intense mana neatly contained inside. Lyra immediately recognizes it as the same kind of device used by the woman trapping the Deity of Greed in Spicy HG's world, a woman who was wearing a very similar cloak...
"I have a set of tools capable of binding it in place for some time."