A new Konami blog article reveals some TCG “Nekroz” names.
Edited with lores.
Nekroz Mirror
This card can be used to Ritual Summon any “Nekroz” Ritual Monster. Tribute monsters from your hand or field, and/or banish “Nekroz” monsters from your Graveyard, then Ritual Summon 1 “Nekroz” Ritual Monster from your hand whose Level exactly equals the total Levels of those monsters. You can only use this effect of “Nekroz Mirror” once per turn. If you control no monsters: You can banish this card and 1 “Nekroz” monster from your Graveyard; add 1 “Nekroz” Spell Card from your Deck to your hand.
Nekroz Kaleidoscope
This card can be used to Ritual Summon any number of “Nekroz” Ritual Monsters. Tribute 1 monster from your hand or field, or send 1 monster from your Extra Deck to the Graveyard, also after that, Ritual Summon any number of “Nekroz” monsters whose total Levels exactly equal the Level of that monster. You can only use this effect of “Nekroz Kaleidoscope” once per turn. If you control no monsters: You can banish this card and 1 “Nekroz” monster from your Graveyard; add 1 “Nekroz” Spell Card from your Deck to your hand.
Shurit, Strategist of the Nekroz
If you Ritual Summon exactly 1 “Nekroz” Ritual Monster with a card effect that requires use of monsters, this card can be used as the entire requirement. If this card is Tributed by a card effect: You can add 1 Warrior-Type “Nekroz” Ritual Monster from your Deck to your hand. You can only use this effect of “Shurit, Strategist of the Nekroz” once per turn.
Nekroz of Brionac
You can Ritual Summon this card with any “Nekroz” Ritual Spell Card. Must be Ritual Summoned without using “Nekroz of Brionac”, and cannot be Special Summoned by other ways. You can only use each of these effects of “Nekroz of Brionac” once per turn.
●You can discard this card; add 1 “Nekroz” monster from your Deck to your hand, except “Nekroz of Brionac”.
●You can target up to 2 face-up monsters on the field that were Special Summoned from the Extra Deck; shuffle them into the Deck.
Source:
Pre-Game Rituals