Ob Nixilis, the Adversary [Streets of New Capenna Prerelease Promos] Necron Warrior (They can't be the targets

(They can't be the targets of spells or abilities

we can save money on chair backs

put one onto the battlefield tapped and one to hand

During any turn you attacked with Goblin Researcher

you may pay {X}{W}{U}{B}

Ob Nixilis, the Adversary [Streets of New Capenna Prerelease Promos] Necron Warrior (They can't be the targetsSet: Streets of New Capenna Prerelease Promos Type: Legendary Planeswalker Nixilis Rarity: Mythic Cost: {1}{B}{R} Casualty X. The copy isn't legendary and has starting loyalty X. (As you cast this spell, you may sacrifice a creature with power X. When you do, copy this spell. The copy becomes a token.) +1: Each opponent loses 2 life unless they discard a card. If you control a Demon or Devil, you gain 2 life. 2: Create a 1 1 red Devil creature token