Confidence:StrongSolidPlausibleTentativeSpeculative

• Helping Hand

  W

  SorceryW

  Helping Hand puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Laccolith Rig

  R

  Enchantment — AuraR

  Both cards trigger when a permanent blocks — they fire together.
• Powerstone Minefield

  2RW

  EnchantmentRW

  Both cards trigger when a permanent blocks — they fire together.
• Trailblazer's Torch

  4

  Artifact — EquipmentC

  Both cards trigger when a permanent blocks — they fire together.
• Delney, Streetwise Lookout

  2W

  Legendary Creature — Human ScoutW

  Delney, Streetwise Lookout makes Chambered Nautilus's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Chambered Nautilus'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 Chambered Nautilus's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Perimeter Captain

  W

  Creature — Human SoldierW

  Both cards trigger when a permanent blocks — they fire together.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes Chambered Nautilus's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hezrou // Demonic Stench

  5BBB

  Creature — Frog Demon // Instant — AdventureB

  Both cards trigger when a permanent blocks — they fire together.
• Luminous Wake

  2W

  Enchantment — AuraW

  Both cards trigger when a permanent blocks — they fire together.
• Extraction Integrant

  1B

  Artifact Creature — BorgB

  Both cards trigger when a permanent blocks — they fire together.
• Close Quarters

  2RR

  EnchantmentR

  Both cards trigger when a permanent blocks — they fire together.
• Favor of the Woods

  2G

  Enchantment — AuraG

  Both cards trigger when a permanent blocks — they fire together.
• Noble Stand

  4W

  EnchantmentW

  Both cards trigger when a permanent blocks — they fire together.
• Infiltration Lens

  1

  Artifact — EquipmentC

  Both cards trigger when a permanent blocks — they fire together.
• Reanimate

  B

  SorceryB

  Reanimate puts Chambered Nautilus 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 Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Labyrinth Raptor

  BR

  Creature — Nightmare DinosaurBR

  Both cards trigger when a permanent blocks — they fire together.
• Can't Stay Away

  WB

  SorceryBW

  Can't Stay Away puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Grazilaxx, Illithid Scholar

  1UU

  Legendary Creature — HorrorU

  Both cards trigger when a permanent blocks — they fire together.
• Resistance Is Futile

  1B

  SorceryB

  Resistance Is Futile puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Animate Dead

  1B

  Enchantment — AuraB

  Animate Dead puts Chambered Nautilus onto the battlefield from a graveyard without casting it, so its mana cost is never paid.