When you deal damage to a creature with this magic +1 longsword, the target must make a Constitution Saving throw with a DC of 10 + the creatures level of exhaustion, on a failed saving throw the creature gains 1 level of exhaustion. This saving throw can not be made with advantage or disadvantage and all levels of exhaustion gained from this weapon are lost after a long rest. On a roll of a 20 on the attack roll the target creature automatically fails the saving throw.
Proficiency with a Longsword 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.
Sap. If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.
Notes: Bonus: Magic, Debuff, Combat, Versatile, Sap
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