Confidence:StrongSolidPlausibleTentativeSpeculative

• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Bloodline Recollector's death or sacrifice trigger.
• Obsessive Pursuit

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Private Research

  U

  Enchantment — AuraU

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Private Research's death or sacrifice trigger.
• Shaile, Dean of Radiance // Embrose, Dean of Shadow

  1W2BB

  Legendary Creature — Bird Cleric // Legendary Creature — Human WarlockBW

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Shaile, Dean of Radiance's death or sacrifice trigger.
• The Serpent Society

  1BG

  Legendary Creature — Human Snake VillainBG

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling The Serpent Society's death or sacrifice trigger.
• Ignoble Hierarch

  G

  Creature — Goblin ShamanBGR

  Both cards trigger when a permanent attacks — they fire together.
• Noble Hierarch

  G

  Creature — Human DruidGUW

  Both cards trigger when a permanent attacks — they fire together.
• Bequeathal

  G

  Enchantment — AuraG

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Bequeathal's death or sacrifice trigger.
• Syr Vondam, Sunstar Exemplar

  WB

  Legendary Creature — Human KnightBW

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Syr Vondam, Sunstar Exemplar's death or sacrifice trigger.
• Bard, Heir of Girion

  2WU

  Legendary Creature — Human ArcherUW

  Both cards trigger when a permanent attacks — they fire together.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Both cards trigger when a permanent attacks — they fire together.
• Combat Calligrapher

  3W

  Creature — Bird ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Winota, Joiner of Forces

  2RW

  Legendary Creature — Human WarriorRW

  Both cards trigger when a permanent attacks — they fire together.
• Gallia of the Endless Dance

  RG

  Legendary Creature — SatyrGR

  Both cards trigger when a permanent attacks — they fire together.
• Jon Irenicus, Shattered One

  2UB

  Legendary Creature — Elf WizardBU

  Both cards trigger when a permanent attacks — they fire together.
• Clavileño, First of the Blessed

  1WB

  Legendary Creature — Vampire ClericBW

  Both cards trigger when a permanent attacks — they fire together.
• Twenty-Toed Toad

  3U

  Creature — Frog WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Enduring Renewal

  2WW

  EnchantmentW

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Enduring Renewal's death or sacrifice trigger.
• Isshin, Two Heavens as One

  RWB

  Legendary Creature — Human SamuraiBRW

  Isshin, Two Heavens as One makes Sephiroth, Fallen Hero's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Eater of Virtue

  1

  Legendary Artifact — EquipmentC

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Eater of Virtue's death or sacrifice trigger.
• Hooded Blightfang

  2B

  Creature — SnakeB

  Both cards trigger when a permanent attacks — they fire together.
• Loot Dispute

  3R

  EnchantmentR

  Both cards trigger when a permanent attacks — they fire together.
• Dyadrine, Synthesis Amalgam

  XGW

  Legendary Artifact Creature — ConstructGW

  Both cards trigger when a permanent attacks — they fire together.
• Skullclamp

  1

  Artifact — EquipmentC

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Skullclamp's death or sacrifice trigger.
• Malicious Affliction

  BB

  InstantB

  Sephiroth, Fallen Hero is a sacrifice outlet, enabling Malicious Affliction's death or sacrifice trigger.