sentences:  One D'Bari originally appeared using a device that turned the Avengers into stone.His name was later revealed to be Vuk, and he did this at the behest of Namor who had a vendetta against the Avengers at the time and promised to free the D'Bari's spaceship (which had become trapped under the sea), if he incapacitated the Avengers.The newly revived Captain America promised to free the alien's ship in return for restoring the Avengers.