Can be used as a flute. Hit points lost to this weapon's damage can be regained only through a short or long rest, rather than by regeneration, magic, or any other means.
On a hit, the target takes an additional 3d8 piercing damage. When you pierce a creature with an attack using this magic weapon, you can wound the target by keeping the weapon inserted in the creature. At the start of yours and the wounded creature's turns, it takes 3d8 piercing damage and it can then make a DC 16 Constitution saving throw, ending the effect of all such wounds on itself on a success.
Effect ends when the weapon is removed from the creature
If a Bard is attuned to this weapon, the bard gains advantage on performance checks when playing on the weapon.
Proficiency with a Rapier allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Vex. If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.
Notes: Damage: Piercing, Damage, Combat, Instrument, Finesse, Vex
Monstrous Compendium Vol. 1: Spelljammer Creatures
Frozen Sick
D&D Beyond Basic Rules
Basic Rules (2014)
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Posted Jan 5, 2021This weapon and one bard can singlehandedly defeat Strahd and other legendary monsters.
On your turn, you are doing regular sword damage 1d8 (assuming a second attack too adds another d8)
plus an additional 3d8 on your turn for the weapons ability.
On their turn it then takes another 3d8 damage automatically, not even a saving throw.
That's 8d8 damage for one round... and then we're at the top of the round where it takes 3d8 on my turn and its turn automatically!
While the Bard arms a different weapon and attacks with something else.
Perhaps consider adding some Saves against the ability, or have it fall out, or have it disintegrate in the creature, or anything to try and balance it.
As is, you stick this in a dragon on round one, and start getting a free 6d8 damage each round automatically that can't be killed and a few rounds later, a legendary creature is dead.