In the age of lottery and/or boost runs, is there truly a mount or mounts who can only be obtained with a decent amount of personal player skill?
edit: I guess gladiator mounts can be in this category, alltho boosts also exists in these cases.
Also what if Proving grounds got redesigned to be quite closely balanced for all classes, and you get a unique mount for endless 30?
Maybe also other personal instanced or world objectives where others cannot interfere with the result.