Batmans nemesis Ras Al Ghul obtained a measure of immortality via the use of Lazarus Pits - a concept created by Dennis ONeill and Neal Adams in 1972. Essentially, a Lazarus Pit is a bubbling clay pit that can restore a sick person to health, or a recently dead person to life. However, for a brief time afterwards, the user tends to be super strong and slightly insane (hey, its comics!). In addition to Ras, there are many instances of other characters using Lazarus Pits. The Riddler hijacked one in order to heal an inoperable brain tumour in Hush, whilst Batwoman used one to heal herself after being fatally wounded in a mineshaft collapse during the events of the Blackest Night. Just imagine what could happen if we could synthesize Lazarus Pits and put them on the NHS! Instant panacea. With Lazarus Pits, all disease (and even death) could be eradicated almost overnight. Now thats a resource worth having!