Nebula Knight of Piercing End, CoreanisSuper Rare

[AUTO]:When this unit is placed on the (RC) with a grade 1 unit with "Coreanis" in its card name, if your opponent's vanguard is grade 2 or greater, Counter Blast (1), search your deck for up to one grade 3 card with "Coreanis" in its card name, call it to the (RC) this unit is on, and shuffle the deck. [CONT](RC):If you have a vanguard with "Nebula Knight" in its card name, this unit cannot be retired by your opponent's card effects.