Confidence:StrongSolidPlausibleTentativeSpeculative

• Morska, Undersea Sleuth

  GWU

  Legendary Creature — Vedalken Fish DetectiveGUW

  Both cards trigger when a card is drawn — they fire together.
• Zimone and Dina

  BGU

  Legendary Creature — Human DryadBGU

  Both cards trigger when a card is drawn — they fire together.
• Sheoldred, the Apocalypse

  2BB

  Legendary Creature — Phyrexian PraetorB

  Both cards trigger when a card is drawn — they fire together.
• Ratadrabik of Urborg✓

  2WB

  Legendary Creature — Zombie WizardBW

  Copy chain: one card creates hasty copies of a creature whose ability or ETB the partner exploits — the canonical Kiki-Jiki / Splinter Twin pattern.
• Niv-Mizzet, Parun

  UUURRR

  Legendary Creature — Dragon WizardRU

  Both cards trigger when a card is drawn — they fire together.
• Gixian Puppeteer

  3B

  Creature — Phyrexian WarlockB

  Both cards trigger when a card is drawn — they fire together.
• Iron Spider, Stark Upgrade

  3

  Legendary Artifact Creature — Spider HeroC

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Niv-Mizzet, the Firemind

  2UURR

  Legendary Creature — Dragon WizardRU

  Both cards trigger when a card is drawn — they fire together.
• Irencrag Pyromancer

  2R

  Creature — Human WizardR

  Both cards trigger when a card is drawn — they fire together.
• Master's Councillors

  1U

  Creature — Human AdvisorU

  Both cards trigger when a card is drawn — they fire together.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Stalwarts of Osgiliath's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Rionya, Fire Dancer

  3RR

  Legendary Creature — Human WizardR

  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.
• Dr. Pulaski, Cynical Clinician

  1W

  Legendary Creature — Human DoctorW

  Both cards trigger when a card is drawn — they fire together.
• Zameck Guildmage

  GU

  Creature — Elf WizardGU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Stalwarts of Osgiliath's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Helm of the Host

  4

  Legendary Artifact — EquipmentC

  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.
• Sage of Fables

  2U

  Creature — Merfolk WizardU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Ray Fillet, Man Ray

  3U

  Legendary Creature — Fish MutantU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Kiki-Jiki, Mirror Breaker

  2RRR

  Legendary Creature — Goblin ShamanR

  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.
• Ro Laren, Double Agent

  2R

  Legendary Creature — Bajoran Rogue OfficerR

  Both cards trigger when a card is drawn — they fire together.
• Aether Syphon

  1UU

  ArtifactU

  Both cards trigger when a card is drawn — they fire together.
• Saheeli, the Sun's Brilliance

  UR

  Legendary Creature — Human ArtificerRU

  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.
• The Jolly Balloon Man

  1RW

  Legendary Creature — Human ClownRW

  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.
• Ensign Harry Kim, Operations

  1W

  Legendary Creature — Human OfficerW

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Reg Barclay, Fidgety Fantasist

  2UR

  Legendary Creature — Human ArtificerRU

  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.