Ob Nixilis of the Black Oath

a Demon enters the battlefield — 284 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When a Demon enters thanks to Ob Nixilis of the Black Oath:

1. Blood Speaker — returns itself from the graveyard
2. Be'lakor, the Dark Master — deals its power damage

a planeswalker it grants abilities to — 312 cards in the game can cause this.

1. Way of the Deathbringer — Way of the Deathbringer gives Ob Nixilis of the Black Oath an extra ability

311 other cards cause it too. These are the ones with the most connections.

a planeswalker is cast — 361 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When Ob Nixilis of the Black Oath is cast:

1. Jaya's Phoenix — returns itself from the graveyard
2. Interplanar Beacon — gains you 1 life
3. Defiler of Flesh — gives +1/+1
4. Primeval Bounty — puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — gets +1/+1
6. Thor, God of Thunder — deals that spell's mana value damage
7. Krile Baldesion — brings a card back
8. Summon: Good King Mog XII — makes a token
9. Kykar, Wind's Fury — makes a token
10. Blood Funnel — sacrifices a creature

239 other cards care about it too. These are the ones with the most connections.

a planeswalker enters the battlefield — 366 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

1. Liliana the Repentant — When a Demon enters thanks to Ob Nixilis of the Black Oath, Liliana the Repentant mills a card
2. Liliana the Faultless — When a Demon enters thanks to Ob Nixilis of the Black Oath, Liliana the Faultless gains you 1 life
3. Builder's Talent — When Ob Nixilis of the Black Oath enters, Builder's Talent puts a counter on a creature
4. Brainstealer Dragon — When a Demon enters thanks to Ob Nixilis of the Black Oath, Brainstealer Dragon makes a player lose life equal to its mana value
5. Cloudstone Curio — When a Demon enters thanks to Ob Nixilis of the Black Oath, Cloudstone Curio triggers

life is gained — 2,076 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When Ob Nixilis of the Black Oath gains life:

1. Dina, Soul Steeper — makes each opponent lose 1 life
2. Marina Vendrell's Grimoire — draws you that many cards
3. South Wind Avatar — makes each opponent lose 1 life
4. Rodolf Duskbringer — grants indestructible
5. Fiendish Panda — puts a +1/+1 counter on itself
6. Veinwitch Coven — brings a card back
7. Cleric Class — puts a counter on a creature
8. Lich's Mastery — draws you that many cards
9. Wall of Limbs — puts a +1/+1 counter on itself
10. Ratchet, Field Medic // Ratchet, Rescue Racer — triggers

84 other cards care about it too. These are the ones with the most connections.

a creature token enters the battlefield — 2,799 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When a Demon enters thanks to Ob Nixilis of the Black Oath:

1. Securitron Squadron — puts a counter on a permanent
2. Anointer Priest — gains you 1 life
3. Nesting Dovehawk — puts a +1/+1 counter on itself

a creature token is created — 2,799 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

1. Staff of the Storyteller — When Ob Nixilis of the Black Oath makes a Demon token, Staff of the Storyteller puts a story counter on itself

3 other cards care about it too. These are the ones with the most connections.

life is lost — 3,160 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

1. Far Fortune, End Boss — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Far Fortune, End Boss raises your speed
2. Zahur, Glory's Past — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Zahur, Glory's Past raises your speed
3. Mendicant Core, Guidelight — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Mendicant Core, Guidelight raises your speed
4. Aether Syphon — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Aether Syphon raises your speed
5. Vnwxt, Verbose Host — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Vnwxt, Verbose Host raises your speed
6. Embalmed Ascendant — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Embalmed Ascendant raises your speed
7. Slick Imitator — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Slick Imitator raises your speed
8. Nesting Bot — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Nesting Bot raises your speed
9. Howlsquad Heavy — When a permanent makes a player lose life thanks to Ob Nixilis of the Black Oath, Howlsquad Heavy raises your speed
10. Oath of Lim-Dûl — When Ob Nixilis of the Black Oath makes a player lose life, Oath of Lim-Dûl sacrifices an enchantment

46 other cards care about it too. These are the ones with the most connections.

a token enters the battlefield — 3,710 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When a Demon enters thanks to Ob Nixilis of the Black Oath:

1. Baron Bertram Graywater — makes a token
2. Marneus Calgar — draws you 1 card
3. Belladonna Took — gains you 1 life
4. Kambal, Profiteering Mayor — makes each opponent lose 1 life
5. Lucy MacLean, Positively Armed — makes a token
6. Mister Fantastic, Reed Richards — draws you 1 card
7. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
8. Woodland Champion — puts that many +1/+1 counters on itself
9. Leonardo, the Balance — puts a counter on a creature
10. Spiritcall Enthusiast // Scrollboost — becomes prepared

3 other cards care about it too. These are the ones with the most connections.

a token is created — 3,711 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When Ob Nixilis of the Black Oath makes a Demon token:

1. Akim, the Soaring Wind — makes a token
2. Idol of Oblivion — draws you 1 card
3. Rosie Cotton of South Lane — puts a counter on a permanent
4. Mirkwood Bats — makes each opponent lose 1 life

17 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 19,800 cards in the game can cause this (Ob Nixilis of the Black Oath is one).

When a Demon enters thanks to Ob Nixilis of the Black Oath:

1. Lunarch Veteran // Luminous Phantom — gains you 1 life
2. Pious Evangel // Wayward Disciple — gains you 1 life
3. Daxos, Blessed by the Sun — gains you 1 life
4. Elas il-Kor, Sadistic Pilgrim — gains you 1 life
5. Ayara, First of Locthwain — makes each opponent lose 1 life

334 other cards care about it too. These are the ones with the most connections.