In Destiny 2 , players learned that Mercury was being mined to the point of breaking apart by the Cabal, to fuel Ghaul's sun-killer weapon, the Almighty. It's unknown how much of it was broken off from the planet proper, but the Curse of Osiris trailer suggests that it's still at least partially int MK 44. Stand Asides (costs 23 Legendary Shards) are exotic Titan class boots that "grants an overshield when sprinting at full health with Seismic Strike, Hammer Strike, or Shield Bash equipped." And...