You can Ritual Summon this card with any "Nekroz" Ritual Spell Card. 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 Graveyard, then discard this card; negate that 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 1 card for each card Tributed.