Not relating to gameplay, just based on Lore which weapon or weapons are the most powerful in existence? I may be wrong but I think Hawkmoon is actually the strongest in the universe but only because what we don’t know the extent of paracausality the weapon has. if you’re not familiar, paracausality is a fictional (?) term within the Destiny universe that essentially means to defy the laws of the universe, therefore it allows that shot to possibly do things like reject gravity, produce infinite amounts of energy and kill things shouldn’t be able to die. This technically could allow it to destroy pretty much any object in the universe that is causal and also allows it to battle against paracausal entities. But again we don’t really know what is paracausal about the shot.