Spy is a class in Team Fortress 2. Spy's arsenal includes: A Revolver, a Sapper, a Butterfly knife, an Invis Watch, and a Disguise Kit Spy's sapper can disable an enemy Engineer's buildings, as well as deplete its health, and if left untreated, eventually destroy it. Spy's butterfly knife does about 45 damage per melee swing, but if you stab someone in the back, it's an instant kill. Spy's invis watch allows Spy to turn invisible with a simple right click, despite whatever weapon you're holding. Finally, your disguise kit allows you to disguise as a member of the enemy team, or your team. If you attack with your disguise on, it will deactivate. Spy is tied for the second fastest class in the game with Medic, and he has 125 health. Spy's playstyle consists of sneaking behind the enemy lines and walking amongst them to assassinate any key targets to turn the tide of the match.