Makradon notices the Dark Angel enter the Thunderhawk, a mutual unbroken bond of secrecy between them that transcended the secrets of even the Deathwatch. He turns to the Dark Angel, looking down at the contraption before him. 

"That is quite a Narthecium you have there, brother. How did you come by it? If you require my assistance, I will be glad to help. These whistles and bells aren't just for show!" He chuckles, as he begins to assist his new brother. 

His mechadendrites and various gears whir and whiz about, ready to obey their master.