Bori
Give in, Devil, let yourself burn! The spirits of this land deserve peace at long last.
Light streams from the blade of his brother as it surges towards Strahd. Bori feels a strong will lend its strength to his as Sergei's righteous anger fills him, finally able to struke at his brother.
Spoiler: Attacks
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Using a level 3 skot for a smite on the first hit then a level 1 on the second, leaving him with one level 2 slot left.
Level 3 Smite (5d8)[19] radiant plus 40 (59 total). Level 1 smite (3d8)[15] plus 24 (39 total).
Attack 1 (1d20+11)[14] (22 on advantage roll) for (2d8+7)[16] radiant plus (1d6)[2] fire. Plus 16 radiant and 6 fire for a total of 40 damage.
Attack 2 (1d20+11)[28] for (2d8+7)[15] radiant plus (1d6)[1] fire plus 16 radiant and 6 fire for a total of 38 damage.