I've defeated the "mighty" Atheon to many times to count. However I'm constantly rewarded with the same old stuff. But it isn't over there. Friends and players I know have done the raid less that what they can count on there hand and they are generously rewarded with the Vex Mythoclast EVER single time. My suggestion is limit the amount of times you can acquire this weapon to one. As well as increase the odds of a raid Veterans odds. But it's just a suggestion. Who else has this issue.