Must be Fusion Summoned. You can only use the 2nd effect of this card’s name once per turn.
(1) At the start of the Damage Step, if this card battles a monster: Change that monster’s ATK/DEF to 0.
(2) If an opponent’s monster(s) is destroyed by battle or card effect: You can destroy all cards they control.
(3) If this face-up card leaves the field by your opponent: You can Special Summon 1 “Earthbound” monster from your Deck or Extra Deck, except “Earthbound Spirit”.