Confidence:StrongSolidPlausibleTentativeSpeculative

• Forgeborn Phoenix

  1RR

  Artifact Creature — Equipment PhoenixR

  Both cards trigger when a creature dies — they fire together.
• Pass the Torch

  1R

  InstantR

  Pass the Torch can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Patriar's Humiliation

  W

  InstantW

  Patriar's Humiliation can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Chaos Balor

  3RR

  Creature — DemonR

  Chaos Balor can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• A-Orcish Bowmasters

  1B

  Creature — Orc ArcherB

  A-Orcish Bowmasters can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Ethrimik, Imagined Fiend

  1WW

  Legendary Creature — Illusion BeastW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Tibalt, Wicked Tormentor

  3RR

  Legendary Planeswalker — TibaltR

  Both cards trigger when a creature dies — they fire together.
• Resolute Rejection

  1W

  InstantW

  Resolute Rejection can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Sparks Ablaze

  R

  InstantR

  Sparks Ablaze can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Stormkeld Curator // Giant Secrets

  4WWXUU

  Creature — Giant // Instant — AdventureUW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Consumed by History

  1R

  SorceryR

  Consumed by History can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Obscura Polymorphist

  1WU

  Creature — Octopus WizardUW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Algorithmic Ferocity

  G

  SorceryG

  Algorithmic Ferocity can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Davriel's Withering

  B

  InstantB

  Davriel's Withering can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Shove Aside

  R

  SorceryR

  Shove Aside can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Conductive Current

  RRR

  SorceryR

  Conductive Current can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Favored Enemy

  G

  EnchantmentG

  Both cards trigger when a creature dies — they fire together.
• Kami of Mourning

  2B

  Creature — SpiritB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• A-Nahiri, Heir of the Ancients

  2RW

  Legendary Planeswalker — NahiriRW

  A-Nahiri, Heir of the Ancients can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Sarkhan, Wanderer to Shiv

  3R

  Legendary Planeswalker — SarkhanR

  Sarkhan, Wanderer to Shiv can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• A-Devoted Grafkeeper // A-Departed Soulkeeper

  WU

  Creature — Human Peasant // Creature — SpiritUW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Melt Through

  R

  InstantR

  Melt Through can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Cindercone Smite

  R

  SorceryR

  Cindercone Smite can kill creatures (with damage or by shrinking them), enabling Athreos, Shroud-Veiled's death-trigger or removal payoff.
• Drover of the Swine

  2WBG

  Creature — Human WarlockBGW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Predatory Sludge

  2B

  Creature — OozeB

  Both cards trigger when a creature dies — they fire together.