Your search for "Atarka, World Render 281" revealed the following:
Atarka, World Render (TDC) from Tarkir: Dragonstorm Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render (Etched) (SCD) from Starter Commander Decks, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Camille Alquier Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render (AFC) from Forgotten Realms Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render (FRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render (Foil) (FRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render (C17) from Commander 2017, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render - Resale Promo (Foil) (PFRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render - Prerelease Promo (Foil) (PFRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
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Atarka, World Render - Promo Pack (PFRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.
Atarka, World Render - Promo Pack (Foil) (PFRF) from Fate Reforged, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Karl Kopinski Card Text:Flying, trampleWhenever a Dragon you control attacks, it gains double strike until end of turn.