Confidence:StrongSolidPlausibleTentativeSpeculative

• Reanimate

  B

  SorceryB

  Reanimate puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Teysa Karlov

  2WB

  Legendary Creature — Human AdvisorBW

  Teysa Karlov makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Animate Dead

  1B

  Enchantment — AuraB

  Animate Dead puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Exhume

  1B

  SorceryB

  Exhume puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Life // Death

  G1B

  Sorcery // SorceryBG

  Life puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Dance of the Dead

  1B

  Enchantment — AuraB

  Dance of the Dead puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Drivnod, Carnage Dominus

  3BB

  Legendary Creature — Phyrexian HorrorB

  Drivnod, Carnage Dominus makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Persist

  1B

  SorceryB

  Persist puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Soul Exchange

  BB

  SorceryB

  Soul Exchange puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Rat King, Verminister

  1B

  Legendary Creature — Rat AvatarB

  Rat King, Verminister puts Serra Paragon onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• The Masamune

  3

  Legendary Artifact — EquipmentC

  The Masamune makes Serra Paragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Song of Creation

  1GUR

  EnchantmentGRU

  Serra Paragon lets you cast/play from the graveyard, enabling Song of Creation's recursion loop.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Serra Paragon lets you cast/play from the graveyard, enabling Baron Helmut Zemo's recursion loop.
• Hydro-Man, Fluid Felon

  UU

  Legendary Creature — Elemental VillainU

  Serra Paragon lets you cast/play from the graveyard, enabling Hydro-Man, Fluid Felon's recursion loop.
• Shanid, Sleepers' Scourge

  1RWB

  Legendary Creature — Human KnightBRW

  Serra Paragon lets you cast/play from the graveyard, enabling Shanid, Sleepers' Scourge's recursion loop.
• Quintorius Kand

  3RW

  Legendary Planeswalker — QuintoriusRW

  Serra Paragon lets you cast/play from the graveyard, enabling Quintorius Kand's recursion loop.
• The Circle of Loyalty

  4WW

  Legendary ArtifactW

  Serra Paragon lets you cast/play from the graveyard, enabling The Circle of Loyalty's recursion loop.
• Jodah, the Unifier

  WUBRG

  Legendary Creature — Human WizardBGRUW

  Serra Paragon lets you cast/play from the graveyard, enabling Jodah, the Unifier's recursion loop.
• Kozilek, Butcher of Truth

  10

  Legendary Creature — EldraziC

  Serra Paragon lets you cast/play from the graveyard, enabling Kozilek, Butcher of Truth's recursion loop.
• Kasla, the Broken Halo

  3URW

  Legendary Creature — Angel AllyRUW

  Serra Paragon lets you cast/play from the graveyard, enabling Kasla, the Broken Halo's recursion loop.