Confidence:StrongSolidPlausibleTentativeSpeculative

• Black Lotus

  0

  ArtifactC

  Black Lotus is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mana Crypt

  0

  ArtifactC

  Mana Crypt is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Emerald

  0

  ArtifactG

  Mox Emerald is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Jet

  0

  ArtifactB

  Mox Jet is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Pearl

  0

  ArtifactW

  Mox Pearl is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Ruby

  0

  ArtifactR

  Mox Ruby is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Sapphire

  0

  ArtifactU

  Mox Sapphire is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Lotus Petal

  0

  ArtifactC

  Lotus Petal is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Lion's Eye Diamond

  0

  ArtifactC

  Lion's Eye Diamond is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mishra's Bauble

  0

  ArtifactC

  Mishra's Bauble is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Mox Amber

  0

  Legendary ArtifactC

  Mox Amber is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Urza's Bauble

  0

  ArtifactC

  Urza's Bauble is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Rinoa, Angel Wing

  2W

  Legendary Creature — Human Rebel WarlockW

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again — or a creature you recast from your graveyard beside a sacrifice outlet that doesn't pay for the recast. Real, repeatable value — not an infinite loop on its own.
• Out of the Tombs

  2B

  EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again — or a creature you recast from your graveyard beside a sacrifice outlet that doesn't pay for the recast. Real, repeatable value — not an infinite loop on its own.
• Illicit Masquerade

  3B

  EnchantmentB

  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.
• Avatar Kyoshi, Earthbender

  5GGG

  Legendary Creature — Human AvatarG

  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.
• Chandra, Flameshaper

  5RR

  Legendary Planeswalker — ChandraR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Recurring Nightmare

  2B

  EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again — or a creature you recast from your graveyard beside a sacrifice outlet that doesn't pay for the recast. Real, repeatable value — not an infinite loop on its own.
• Tormod's Crypt

  0

  ArtifactC

  Tormod's Crypt is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• The Mighty Thor, Jane Foster

  1WU

  Legendary Creature — Human God HeroUW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Gitaxian Probe

  U/P

  SorceryU

  Gitaxian Probe is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• Thassa, Deep-Dwelling

  3U

  Legendary Enchantment Creature — GodU

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Mirrorhall Mimic // Ghastly Mimicry

  3U

  Creature — Spirit // Enchantment — AuraU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Chrome Mox

  0

  ArtifactC

  Chrome Mox is a free spell, so Lightshell Duo's cast trigger fires for nothing.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.