Infiltration Dagger

+1 Magical Item: once attuned, can summon a magical tanto shaped dagger with a bonus action. For 10 minutes after first being summoned with a bonus action, if dropped once summoned, it magically returns to the hand with a free action.

Damage: 1d4+1

Attuned

Player must track number of kills with the dagger as the finishing blow and tell the DM when it gets to 10 kills.