The Haven Angel is a post-Dreadknight boss as the summoning item, Angel's Tear, can only be acquired by killing Weeping Angels with a Dread Blade which is dropped by the Dreadknight. The Haven Angel is arguably one of if not the most difficult bosses in Survival Expansion III. Upon killing the Haven Angel, it will drop 2 Angel's Bones. Angel's Bones are the final crafting ingredients to the Neptunium Pickaxe. Combine 2 Angel's Bones, 2 Neptunium Ingots, and a Neptunium Crystal in a Haven Altar to craft the Neptunium Pickaxe.