Enma Stealth Dragon, Maguntenbu D-SS09/018 TD

(This card cannot be in your main deck) [Stride]-Stride Step-COST [Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them], and Stride this card on your (VC) from face down. (When you stride, your original vanguard becomes a heart card, and this unit gets that card's [Power] and card name. At the end of the turn, return this unit face up) Dominate-[ACT](VC)1/Turn:COST [Counter Blast (1) & turn a card from G zone face up], choose one of your opponent's rear-guards, [Stand] and dominate it, it attacks your opponent's other unit, and retire that dominated unit at the end of that battle.