Poisoned Dagger. Melee Weapon Attack: +2 to hit, reach 5ft., one target. Hit. 4 (1d4) bludgeoning plus (1d6) poisoning damage. If the Target is a Creature, it must suceed on a DC 14 Constitution Saving throw or be poisoned until they can wear off the effect or until the Creature dies. While poisoned, the creature can roll another save on it's turn to end the effect on a success, or suffer (1d4-1) poisoning damage.
Definitely not alone. Or outside his walls.