D: Well, I'm pretty sure papa Oryx is all grumpy-wumpy over the fact his son was killed by yours truly with his own sword. I, for sadistic reasons, keep a shard of Crota's soul in a container in a bunker I have somewhere around the good 'ol Cosmodrome. You tell me who they are, I bring them all there, they take a nice shower with Crota's lingering spirit-fart, and we're all happy dandy ready to swing at oryx in his own place.