You can Ritual Summon this card with any "Nekroz" Ritual Spell Card. Must be Ritual Summoned, without using any Level 7 monsters, and cannot be Special Summoned by other ways. You can only use each of these effects of "Nekroz of Gungnir" once per turn. ● During either player's turn: You can discard this card, then target 1 "Nekroz" monster you control; it cannot be destroyed by battle or by card effects this turn. ● During either player's turn: You can discard 1 "Nekroz" card, then target 1 card on the field; destroy it.
They're an evolution on gishki.
Gishkis focused on violently sacrificing their people to create sea monsters.
The nekroz are the survivors that reversed the situation, sacrificing monsters to make armor