Your search for "The Aether Flues" revealed the following:
Aetherflux Reservoir - Schematic Art (BRR) from The Brothers' War Retro Artifacts, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Yeong-Hao Han Card Text:Whenever you cast a spell, you gain 1 life for each spell you've cast...
Starting with The Brothers' War, Buy-a-Box Promos will only be available for in-store pick-ups and purchase while supplies last as stated in Wizards of the Coast's article here. Does Not Contain Any Promotional Material
The Aether Flues - Oversized Planechase Card (MOC) from March of the Machine Commander, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Jason A. Engle Card Text:When you planeswalk to The Aether Flues and at the beginning of...
The Aether Flues - Oversized Planechase Card (OHOP) from Planechase Planes, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Jason A. Engle Card Text:When you planeswalk to The Aether Flues or at the beginning of your upkeep, you...
Aetherflux Reservoir (Foil) (BRR) from The Brothers' War Retro Artifacts, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Cliff Childs Card Text:Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.Pay...
Aetherflux Reservoir - Schematic Art (Foil) (BRR) from The Brothers' War Retro Artifacts, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Yeong-Hao Han Card Text:Whenever you cast a spell, you gain 1 life for each spell you've...