Bloodstained Battle Knight, Dorint

(This ability is active if you have one or more face up G units in total on your or G zone):During your turn, if you have a grade 3 or greater vanguard with "Blaster" in its card name, this unit gets +2000, and ":When this unit attacks a vanguard, if this unit is boosted ([Boost]) by a unit with "Claudas" in its card name, choose a card from your damage zone, and turn it face up.".