Not quite, it’s implied but there’s no concrete proof.

“Scorn guns can’t kill a Ghost,” the man said, taking a step away from the wall, and uncrossing his arms.

Aunor ignored him. “Cause of death?” she continued.

“’Sundance’ appears to be the victim of a single, catastrophic wound from a Devourer Bullet, modified to fire from a Scorn launcher. Projectile classified as ontological.”

“Define Devourer Bullet.”

“Payload matches the ballistics of a Weapon of Sorrow or a comparable Hive implement.”

“What do you think, Warlock?” Aunor asked the man without turning around.

“Didn’t the Mindbender build himself an Ascendant throne?”

“Yes.”

“Crafting bullets sounds easy if you can manage that.”

“Sword Logic doesn’t work that way. The throne came after,” Aunor replied. “It was built on Cayde-6’s death. I didn’t catch your name.”

“Finch,” said the man.