Board Thread:Lore Discussion/@comment-68.45.229.57-20130720115140/@comment-202.156.8.12-20131122113400

If you really wanted to stop the prophecy, just kill Harkon when you first see him by sticking a legendary stalhrim sword of chaos and life leech through him (you all know what I mean).

If you were fanatical (in real life), you would have destroyed the dawnguard, exterminated the vokihar and (sadly, I regret) murdered the lovely Serana and burned her body (you have to burn all the bodies to ash, actually).

KPG would die by your hand and you would use the aetherium forge to destroy Auriel's bow (or at least try).

Also, to really stop the prophecy, everybody who knows of its existance must die, so after destroying/banishing Auriel's bow, you must kill yourself (or enter exile till death), also making sure that the elder scrolls which contain the info are stored away/banished/destroyed

Anyway, back to the original point, I think there should have been the option of permanently tainting the bow in game, like they let you kill Valerica for her blood to taint the bow and permanently blot out the sun (better than killing Serana, at any rate)