Eradicator, Dragonic Deathscythe

: 1 When this unit is placed on , if you have a vanguard with "Descendant" in its card name, you may pay the cost. If you do, your opponent chooses one of his or her rear-guards, and retires it. :[Put this unit into your soul] When your unit with "Descendant" in its original card name is placed on , you may pay the cost. If you do, choose one of your opponent's rear-guards in the front row, and retire it.