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If there are no penalty attacks against Varya for this, and the action makes sense, the re-imagined version shows her trying to retrieve the key by hooking it with the handle of her scythe (or with the blade, but safely).
If such an action is not предусмотрено by the game mechanics, then Varya simply dramatically misses, swinging her scythe away from the bandit (?), or behind him.