You can Ritual Summon this card with any "Nekroz" Ritual Spell. Must be Ritual Summoned without using any Level 8 monsters, and cannot be Special Summoned by other ways. You can only use each of these effects of "Nekroz of Valkyrus" once per turn.
• When an opponent's monster declares an attack: You can banish 1 "Nekroz" card from your GY and discard this card; negate the attack, then end the Battle Phase.
• During your Main Phase: You can Tribute up to 2 monsters from your hand and/or your side of the field, and if you do, draw the same number of cards you Tributed.