Lucky Break

Fall far enough to nearly die, but not quite - the achievement wants you surviving on a sliver. The controlled way: work out your max survivable height with a Lucky Horseshoe not equipped, at full health, and jump from a platform tower into flat ground; tune the height until you land single-digit. Slightly less scientific: it tends to pop by accident around the time you get cocky with wings off. A bed nearby saves the walk when the maths goes wrong.