Impure counterparts

Impure counterparts is a series of Impure Monsters, whose idea is started by LHK and helped by Hiro and Nova. It is a series of Impure Monsters that may or may not be DARK monsters (it is not a requirement), but if it is not a DARK monster, then it must have the Attribute of the monster it counterparts. Also, the monster must be the same type as the "original" monster. For example, if you are making an Impure counterpart of a Fusion Monster, then the Impure counterpart must be an Impure Fusion Monster. An additional condition before making Impure counterparts is that all Impure counterparts must have at least 1 effect that Seal other cards.