[ Pendulum Effect ] If a monster(s) is Special Summoned and you control "Supreme King Z-ARC" and another Pendulum Monster (except during the Damage Step): You can Special Summon this card, then you can make the Level and Attribute of either this card or 1 Pendulum Monster you control become the same Level and Attribute as the other. You can only use this effect of "Supreme King Dragon Lightwurm" once per turn. [ Monster Effect ] If this card is Normal or Special Summoned: You can add 1 face-up "Supreme King Dragon" or "Supreme King Gate" Pendulum Monster from your Extra Deck to your hand, then, immediately after this effect resolves, you can Synchro or Xyz Summon 1 "Supreme King Dragon" monster. If a face-up Pendulum Monster(s) you control is destroyed by battle or card effect, while this card is face-up in your Extra Deck: You can add this card to your hand. You can only use each effect of "Supreme King Dragon Lightwurm" once per turn.