If you're are starting your exotic sword quest please note do NOT buy the legendary sword with the character you plan on doing the exotic quest with. Transfer all three to a character who has NOT purchased a sword with hadium flake. This let's you unlock all of them instead of just the one that you bought. I started the exotic quest with sol edge and ended with arc edge and it gave me BOTH material quests (after "honing the edge" quest) also USE A TITAN FOR RAZE LIGHTER AND BOLT CASTER . Use juju or supercell on crota end raid for fast super charge for subclass kills, hammers or smash wipe, rinse, repeat