Protective Soul Ailin (Common)

Once per turn, you can equip this card to an "Indomitable Fighter Lei Lei" you control, OR unequip it to Special Summon this card in face-up Attack Position. When equipped to a monster by this card's effect, you can change that monster's battle position once per turn. (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed by battle, destroy this card instead.)