You can Ritual Summon this card with any "Nekroz" Ritual Spell. Must be Ritual Summoned. You can only use each of these effects of "Nekroz of Clausolas" once per turn.
• You can discard this card; add 1 "Nekroz" Spell/Trap from your Deck to your hand.
• (Quick Effect): You can target 1 face-up monster on the field that was Special Summoned from the Extra Deck; until the end of this turn, that target's ATK becomes 0, also that target's effects are negated.