A vision and a bolter.

It had been hours after the battle on Cadia and Atonement still had not managed to calm down.
His altered space marine mind still pumping adrenaline into his system. He stll wanted to rend and tear, to decorate his glaive with the innards of the Emperors enemies. He walked around the ship, trying to control the urge to kill everyone he came across. He scrunched his organic hand so hard the nails bit into his flesh and drew blood. Checking his surroundings he found he had stumbled into the chapel. Needing some peace of mind he walked to the shrine of the Emperor on one knee to pray. He let the prayers and litanies sooth the raging beast that had once been his mind. As his mind became less erratic he offered one last prayer to his devine Emperor and stood.

Upon opening his eyes he found himself in a steaming jungle, very differant from the ship,
His grip on his glaive tightened and he prepared for the possibility of combat. An old voice with a similar quality to the cracking of granite, came from behind him. 'Always looking for prepared for a fight arent we, eh Tynerion?' Atonement went rigid, 'I have not been called that for a long time old man.'There was an odd barking sound coming from the old man. It seemed that he was laughing 'I know that World Eater, I know all about you and your past, of how you led warfleets into the Imperium, Even previous to your second progenoid gland implant'
Atonement blinked back a tear, remembering his past life how he had led the World Eaters to Victory on a dozen worlds before being captured by Blood Angel's on Severus he was going to be put to death until the librarian Mephiston was overcome by visions of the Emperor to let him live. He was hastily put into the bio-knights project along with Arch. And the rest was history.
'Who are you old man?' The man walked forward lifting a box to give to Atonement. He took it 'Im a friend. The purpose of this item will be understood when the time comes. Until we meet again Tynerion,'

The forest faded away to be replaced by the chapel. He looked to the case that was held in his bionic. He opened it, to find a bolter. It was a magnificent weapon, cased in gold with ANGRON stamped into the side. Checking the magasine he saw it didnt contain standered shells,
but executionor rounds, each shell having guidence systems making them effectively homing missiles. Also there were several spare magazines, each containing the rare rounds. He closed the case and walked to the bridge. Preparing to inform the others of his vision.