Wondrous Item, very rare
A polished black shaft of pig iron fletched with pieces of Roc feathers and tipped with sharpened dragon scales. When used against a dragon (including all monsters labeled as "dragon") each arrow deals an extra 3d6 piercing damage.
If a dragon is hit by this arrow, they must succeed a DC14 constitution saving throw, or lose one damage resistance resistance of the DM's choice until your next turn.
Notes: Damage: Piercing, 300 gp
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