Ob Nixilis, the Adversary

psncStreets of New Capenna Promos#206pmythic2022-04-29

Playable copy from ~$1.84Legal in 13 of 23 formats

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Understand this card

Oracle text

Legendary Planeswalker — Nixilis

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 with "When this token dies, it deals 1 damage to any target."

−7: Target player draws seven cards and loses 7 life.

Loyalty3

Ability breakdown

Abilities

StaticCasualty 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.)

Loyalty+1: Each opponent loses 2 life unless they discard a card. If you control a Demon or Devil, you gain 2 life.

Loyalty−2: Create a 1/1 red Devil creature token with "When this token dies, it deals 1 damage to any target."

Loyalty−7: Target player draws seven cards and loses 7 life.

Rulings

WotCApr 29, 2022
As you cast a spell with casualty X, you choose whether to pay its casualty cost and what the value of X will be.
WotCApr 29, 2022
Casualty N means "As an additional cost to cast this spell, you may sacrifice a creature with power N or greater." and "When you cast this spell, if a casualty cost was paid for it, copy it. If the spell has any targets, you may choose new targets for the copy."
WotCApr 29, 2022
If you pay the casualty cost of a spell, the copy will resolve before the original spell.
WotCApr 29, 2022
The copied spell from Ob Nixilis, the Adversary's triggered ability copies exactly what is printed on Ob Nixilis, except its starting loyalty is equal to the chosen value of X and it isn't legendary. The copy becomes a token as it resolves.
WotCApr 29, 2022
The copy of the spell is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.
WotCApr 29, 2022
You can control exactly one legendary Ob Nixilis, the Adversary and any number of nonlegendary copies of Ob Nixilis, the Adversary.
WotCApr 29, 2022
You may sacrifice only one creature to pay a spell's casualty cost, and you copy the spell only once.