Building your own Exotic weapon: once reaching light level 20 you gain the ability to build your own exotic. The player will choose from a base common weapon (level 1) of any type (e.g. Hand cannon) The player must then kill enemies level 20 or greater with it (difficult at first obviously) As the player kills more the weapon raises in power, (levelling it up) until it is the same strength as an exotic weapon. As the weapon is being levelled up, the player can choose specific upgrades, but will have to upgrade like a normal weapon (e.g. With ascendant energy etc) However the the weapon inherits traits of the type of enemy it kills (for example the type of damage; void,solar,arc) so that the player doesn't have full control, although the weapon shapes intend into the players traits/habits This way the weapon will be unique and special to you, and maybe even players will have a bond with their weapon