Dagger of Venom

You gain a +1 bonus to attack and damage rolls
made with this magic weapon.
Once a day, 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.