Confidence:StrongSolidPlausibleTentativeSpeculative

• Teferi, Temporal Pilgrim

  3UU

  Legendary Planeswalker — TeferiU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• The Locust God

  4UR

  Legendary Creature — GodRU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Mindless Conscription

  2B

  EnchantmentB

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Gurgling Anointer

  2B

  Creature — Phyrexian HorrorB

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Chasm Skulker

  2U

  Creature — Squid HorrorU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Ominous Seas

  1U

  EnchantmentU

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

  5RR

  Legendary Planeswalker — ChandraR

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Thassa, Deep-Dwelling

  3U

  Legendary Enchantment Creature — GodU

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Righteous Valkyrie

  2W

  Creature — Angel ClericW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Lord Skitter, Sewer King

  2B

  Legendary Creature — Rat NobleB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Soulherder

  1WU

  Creature — SpiritUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• 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.).
• Dragon's Hoard

  3

  ArtifactC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Saheeli Rai

  1UR

  Legendary Planeswalker — SaheeliRU

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Bishop of Wings

  WW

  Creature — Human ClericW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Jolrael, Mwonvuli Recluse

  1G

  Legendary Creature — Human DruidG

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Mischievous Mystic

  1U

  Creature — Human WizardU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Daughter of the Deep

  1U

  Creature — Merfolk NobleU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Don & Leo, Problem Solvers

  3W/UW/U

  Legendary Creature — Mutant Ninja TurtleUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Lathliss, Dragon Queen

  4RR

  Legendary Creature — DragonR

  Both cards trigger when a creature enters the battlefield — they fire together.
• Obyra, Dreaming Duelist

  UB

  Legendary Creature — Faerie WarriorBU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Ayara, First of Locthwain

  BBB

  Legendary Creature — Elf NobleB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Valley Questcaller

  1W

  Creature — Rabbit WarriorW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Kíli the Resourceful

  1W

  Legendary Creature — Dwarf ScoutW

  Both cards trigger when a creature enters the battlefield — they fire together.