Perdition Dragon, Petal Flare Dracokid

:Forerunner (When a unit of the same clan rides this unit, you may call this unit to ) :[Put this unit into your soul] When your vanguard [Legion], you may pay the cost. If you do, choose one of your vanguards, until end of turn, it gains ":When this unit's attack hits, choose one of your opponent's rear-guards, and retire it.".