Dragdriver, Luard D-SS10/018 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) [AUTO](VC) Ritual 3:When this unit attacks, COST [Counter Blast 1 & turn a card from G zone face up], search your deck for up to one unit card with the Ritual ability, call it to (RC), and shuffle the deck.