Gunkan Suship Shirauo-class Carrier

2 Level 4 monsters
If this card is Xyz Summoned: You can apply these effects, in sequence, based on the materials used. You can only use this effect of "Gunkan Suship Shirauo-class Carrier" once per turn.
● "Gunkan Suship Shari": Draw 1 card.
● "Gunkan Suship Shirauo": Add 1 "Gunkan" Spell/Trap from your Deck to your hand.
While a face-up card is in a Field Zone, "Gunkan" monsters you control Special Summoned from the Extra Deck cannot be destroyed by your opponent's card effects, and gain ATK equal to their original DEF.