Confidence:StrongSolidPlausibleTentativeSpeculative

• Coral Reef

  UU

  EnchantmentU

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Vivien, Monsters' Advocate

  3GG

  Legendary Planeswalker — VivienG

  Both cards produce the same kind of effect (shared token subtype).
• Reanimate

  B

  SorceryB

  Reanimate puts Baloth Prime 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 Baloth Prime onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Scouring Swarm

  1BG

  Creature — InsectBG

  Both cards trigger when a permanent is sacrificed — they fire together.
• Sandbender Scavengers

  WB

  Creature — Human RogueBW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Korvold, Fae-Cursed King

  2BRG

  Legendary Creature — Dragon NobleBGR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Baloth Prime's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Eloise, Nephalia Sleuth

  3UB

  Legendary Creature — Human RogueBU

  Both cards trigger when a permanent is sacrificed — they fire together.
• Szarel, Genesis Shepherd

  2BRG

  Legendary Creature — Insect DruidBGR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Tolls of War

  WB

  EnchantmentBW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Mayhem Devil

  1BR

  Creature — DevilBR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Juri, Master of the Revue

  BR

  Legendary Creature — Human ShamanBR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Carmen, Cruel Skymarcher

  3WB

  Legendary Creature — Vampire SoldierBW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Baloth Prime's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hearthhull, the Worldseed

  1BRG

  Legendary Artifact — SpacecraftBGR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Popular Egotist

  2B

  Creature — Human RogueB

  Both cards trigger when a permanent is sacrificed — they fire together.
• Vito, Fanatic of Aclazotz

  2WB

  Legendary Creature — Vampire DemonBW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Desert Warfare

  3G

  EnchantmentG

  Both cards trigger when a permanent is sacrificed — they fire together.
• Pirate Peddlers

  2B

  Creature — Human PirateB

  Both cards trigger when a permanent is sacrificed — they fire together.
• Scavenger's Talent

  B

  Enchantment — ClassB

  Both cards trigger when a permanent is sacrificed — they fire together.
• Havoc Jester

  4R

  Creature — DevilR

  Both cards trigger when a permanent is sacrificed — they fire together.
• Gixian Infiltrator

  1B

  Creature — Phyrexian HumanB

  Both cards trigger when a permanent is sacrificed — they fire together.
• Mazirek, Kraul Death Priest

  3BG

  Legendary Creature — Insect ShamanBG

  Both cards trigger when a permanent is sacrificed — they fire together.
• Sorcerer's Broom

  2

  Artifact Creature — SpiritC

  Both cards trigger when a permanent is sacrificed — they fire together.