Mist Phantasm Pirate King, Nightrose (DZ-SS03/017EN) [Stride Deckset -Nightrose-]

(This card cannot be in your main deck) [Stride]-Stride Step-[COST][Discard a grade 3 card with "Nightrose" in its card name from 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.