Mist Phantasm Pirate King, Nightrose DZ-SS03/017R TDR

(This card cannot be in your main deck) [Stride]-Stride Step-COST [Discard a grade 3 card with "Nightrose" in its card name from your hand], 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) Generation Break 2 :When this unit attacks a vanguard, COST [Counter Blast (1) & retire two rear-guards], choose up to two grade 2 or greater cards with different card names from your drop, and call them to (RC). If your drop has ten or more cards, this unit gets [Critical]+1 until end of that battle, and if your drop has fifteen or more cards, all of those called units get [Power]+10000 until end of turn.