Choose 1 monster on the field, and until the end of the next turn, it cannot be destroyed by battle. After choosing a card, then you can apply the following effect.
Discard 1 card, and if you do, Special Summon 1 Level 1 "Purrely" monster from your Deck.
A "Purrely" Xyz Monster that has this card as material gains the following effect.
Gains 300 ATK/DEF for each material attached to it.