---
name: "Ob Nixilis, the Adversary"
mana_cost: "{1}{B}{R}"
cmc: 3
type_line: "Legendary Planeswalker — Nixilis"
colors: []
color_identity: ["B", "R"]
keywords: ["Casualty"]
set: "PRM"
set_name: "Magic Online Promos"
collector_number: "99687"
rarity: "mythic"
artist: "Yongjae Choi"
oracle_id: "a6abb6af-7ea2-43f3-8718-2a077ad0c947"
canonical_url: "https://avascry.com/printing/ob-nixilis-the-adversary-prm"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Ob Nixilis, the Adversary
- **Mana Cost:** `{1}{B}{R}` (CMC: 3)
- **Type:** Legendary Planeswalker — Nixilis
- **Keywords:** Casualty

## Oracle Text
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.

## Top 4096-Dim Neural Synergies
1. [Ob Nixilis Reignited](/printing/ob-nixilis-reignited-dsc.md) — Legendary Planeswalker — Nixilis
2. [Ob Nixilis of the Black Oath](/printing/ob-nixilis-of-the-black-oath-cmm.md) — Legendary Planeswalker — Nixilis
3. [Ob Nixilis, the Hate-Twisted](/printing/ob-nixilis-the-hate-twisted-war.md) — Legendary Planeswalker — Nixilis
4. [Ob Nixilis, Captive Kingpin](/printing/ob-nixilis-captive-kingpin-mat.md) — Legendary Creature — Demon
5. [Ob Nixilis, Unshackled](/printing/ob-nixilis-unshackled-2x2.md) — Legendary Creature — Demon
6. [Nicol Bolas, the Deceiver](/printing/nicol-bolas-the-deceiver-hou.md) — Legendary Planeswalker — Bolas

## Printing Details
- **Set:** Magic Online Promos (PRM) #99687
- **Rarity:** Mythic
- **Artist:** Yongjae Choi
- **Total Printings:** 7 across all historical editions

## Format Legalities
Commander: `legal` | Standard: `not_legal` | Modern: `legal` | Pioneer: `legal` | Legacy: `legal` | Vintage: `legal` | Pauper: `not_legal` | Penny: `not_legal`

## Official Rulings
- *(2022-04-29)* As you cast a spell with casualty X, you choose whether to pay its casualty cost and what the value of X will be.
- *(2022-04-29)* 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.
- *(2022-04-29)* 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."
- *(2022-04-29)* You can control exactly one legendary Ob Nixilis, the Adversary and any number of nonlegendary copies of Ob Nixilis, the Adversary.
- *(2022-04-29)* You may sacrifice only one creature to pay a spell's casualty cost, and you copy the spell only once.
- *(2022-04-29)* 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.