Confidence:StrongSolidPlausibleTentativeSpeculative

• Pili-Pala

  2

  Artifact Creature — ScarecrowC

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

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

  3

  ArtifactC

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

  2

  Artifact — EquipmentC

  Air Servant has activated abilities that aren't mana abilities, fueling Illusionist's Bracers's activation-trigger.