Dagger of Venom (Banned)

Enchanting [Implemancer] - Artisan
Time: PT400H
Value: 11,000 gp

Tools: smith's tools
Ability Check: DC 20 Intelligence check
Properties: none
Description: You gain a +1 bonus to attack and damage rolls made with this magic weapon. You can use an action to cause thick, black poison to coat the blade. The poison remains for 1 minute or until an attack using this weapon hits a creature. That creature must succeed on a DC 15 Constitution saving throw or take 2d10 poison damage and become poisoned for 1 minute. The dagger can't be used this way again until the next dawn.