Confidence:StrongSolidPlausibleTentativeSpeculative

• Basri, Tomorrow's Champion

  W

  Legendary Creature — Human KnightW

  Basri, Tomorrow's Champion has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Summoner's Sending

  1W

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Morska, Undersea Sleuth

  GWU

  Legendary Creature — Vedalken Fish DetectiveGUW

  Both cards trigger when you draw a card — they fire together.
• Unearth

  B

  SorceryB

  Unearth has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Flame Blitz

  R

  EnchantmentR

  Flame Blitz has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• My Precious // Allure of Power

  31B

  Legendary Artifact — Equipment // Instant — AdventureB

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

  1GGGG

  SorceryG

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

  W

  SorceryW

  Jolted Awake has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Decree of Annihilation

  8RR

  SorceryR

  Decree of Annihilation has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Zimone and Dina

  BGU

  Legendary Creature — Human DryadBGU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Tribute to the World Tree

  GGG

  EnchantmentG

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

  1GWU

  Legendary Creature — Elder DragonGUW

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Bard, King of Dale

  4WU

  Legendary Creature — Human Noble ArcherUW

  One card multiplies the tokens the other creates — a token doubler pointed at a steady token source.
• Decree of Pain

  6BB

  SorceryB

  Decree of Pain has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Antiquities on the Loose

  1WW

  SorceryW

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

  3U/BU/B

  EnchantmentBU

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

  B

  Enchantment Creature — Human CitizenB

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Galadriel, Light of Valinor

  2GWU

  Legendary Creature — Elf NobleGUW

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

  1UU

  InstantU

  Neutralize has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Resounding Thunder

  2R

  InstantBGR

  Resounding Thunder has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Boon of the Wish-Giver

  4UU

  SorceryU

  Boon of the Wish-Giver has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Kykar, Wind's Fury

  1URW

  Legendary Creature — Bird WizardRUW

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

  3WW

  SorceryW

  Spectacular Pileup has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Webstrike Elite

  GG

  Creature — Insect ArcherG

  Webstrike Elite has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Intimidation Tactics

  B

  SorceryB

  Intimidation Tactics has cycling, and Foggy Swamp Spirit Keeper pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.