I kill Sepiks Prime nearly everyday sometimes a couple times a day, and he won't stay dead. He just keeps coming back. Maybe I need some better weapons...... But the last 3-4 level ups with the cryptarch have all been blue engrams, and the same blue shader!!!!! Ahhhhhh stupid blue color!!!! I did get two purple heavy weapon engrams, and they both turned into the exact same rocket launcher so now I have two. Hurray!!! All that was just a rant tho. I am seriously addicted to this game so good job Bungie. Can't wait for some new content tho. And they already have sparrow racing start a strike, and race through all the angry mobs until you get to the final boss.