O Forbidden Evil-eye, Open

Play this with [COST][Energy-Blast 3] if you have a "Demon Stealth Dragon, Shiranui "Oboro"" crest! Choose a unit card with "Stealth" in its card name without sentinel from your drop, and call it to (RC). [AUTO]:When this card is discarded from hand while paying the cost for [Stride], choose one of your vanguards or hearts, and until end of turn, reduce the next [Counter-Blast] cost you pay for that card's abilities by ①.