Once per turn, if you Normal or Special Summon a "Gunkan" monster(s), even during the Damage Step: You can place 1 "Gunkan" card from your Deck on top of your Deck. Once per turn, if your "Gunkan" monster(s) Special Summoned from the Extra Deck is sent to the GY by an opponent's card: Your opponent must pay LP equal to the DEF that monster had on the field, then you can Special Summon 1 "Gunkan Suship Shari" from your hand, then Special Summon from your Extra Deck, 1 "Gunkan" Xyz Monster by using that monster as material. (This is treated as an Xyz Summon.)