The steed of a paladin isn't your typical mount. Unlike the early mounts of vanilla, it never existed as a physical object -- it was a spell cast by the paladin that summoned the steed from nowhere. In later years, it has since joined the rest of Warcraft's steeds on the mount tab, but for the longest time, the charger could only be found in the paladin's spellbook. This was no ordinary mount -- and its origins were also far from ordinary. While blood elves, draenei, and tauren were later introduced and given unique mounts of their own, in the original game the paladin class and its unique steed were only available to humans and dwarves.
Unfortunately, the days of tracking down and compiling the elusive materials needed to harness a charger have disappeared since the release of Cataclysm, which saw both the quest chain for the Alliance, as well as the chain introduced for the Horde, removed in patch 4.0.1. But although the paladin's charger can now simply be learned at the appropriate level, there was a time where obtaining that steed was a much more difficult task, one with a unique and interesting tale behind it. As is only appropriate for a paladin, it's a tale of Light lost, a tale of redemption and hope.