Confidence:StrongSolidPlausibleTentativeSpeculative

• Prize Pig

  1G

  Creature — BoarG

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Phial of Galadriel

  3

  Legendary ArtifactC

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Shifting Woodland

  LandG

  Graveyard copier: one card stocks the graveyard (mill, surveil, dredge) and the other can repeatedly become a copy of a card that's there, borrowing its abilities without recasting it — the Shifting Woodland + Aftermath Analyst shape.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Uurg, Spawn of Turg has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Rings of Brighthearth

  3

  ArtifactC

  Uurg, Spawn of Turg has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Illusionist's Bracers

  2

  Artifact — EquipmentC

  Uurg, Spawn of Turg has activated abilities that aren't mana abilities, fueling Illusionist's Bracers's activation-trigger.