The term “chasing the dragon” is in reference to those who use heroin. Some say it refers to when the heroin is burned on tinfoil and the smoke rises and resembles a dragon. Others say it is just the chasing of the high heroin gives.
There was a time when Bruce Dickinson wasn’t in Iron Maiden. In fact there were two times. The first was the origins of the band with Paul Di’Anno at the mic from 1976 to 1981. Also after Bruce left the band in 1994 he was replaced by Blaze Bayley till 1999.