The stalker is alternate upgrade of the first-level scout of the Dungeon in Heroes of Might and Magic V: Tribes of the East. Like the assassin, it has Poisonous Attacks, which means that any enemy unit it attacks, will take damage every round for three rounds. It lacks the Assassin's ranged attack, but has better stats and the Invisibility ability. This ability makes the Stalker invisible, unable to be attacked or targeted with spells, for three turns, until it attacks an enemy stack, or until it stands adjacent to an enemy stack, whichever comes first. It can still be harmed by Area of Effect spells.