Destiny’s Necrochasm is an exotic auto rifle obtained by updating the legendary auto rifle Eidolon Ally with something called Crux of Crota. This drop will happen only in the Crota’s End raid on hard mode and it is a rare drop!

 

Apparently, this exotic will have 339 attack power and not the suggested 331 and it comes fully loaded once obtained that Crux.

 

Whether this is true or not, we will continue playing CoE on hard mode and we will update you with more facts on the Necrochasm.