Another came up behind him but Vrenna's saber slashed both his legs behind the knees and dropped him screaming to the ground.
The demon was coming at Vrenna, so he sliced him with his saber.
mnli hypothesis: The demon was coming at Vrenna, so he sliced him with his saber. premise: Another came up behind him but Vrenna's saber slashed both his legs behind the knees and dropped him screaming to the ground.