Poison Dagger is a Dagger and a weapon skill that appears exclusively in Fire Emblem Heroes.
Poison Dagger
Dagger
Effective against infantry foes. Aftercombat, if unit attacked, inflicts Def/Res-4on infantry foe through its next action.
Poison Dagger+
Effective against infantry foes. Aftercombat, if unit attacked, inflicts Def/Res-6on infantry foe through its next action.