You can get this mission after helping Sir Hammerlock find the logs of Taggart duing "Stalker of Stalkers". When visiting the Wildlife Exploitation Preserve, you'll be able to find another log from Taggart talking about a mother's day gift that can only be opened by placing his own fist in the lock. The fist that was eaten by a rather menacing Stalker named Henry.
- XP: 2611
- Money: N/A
- Gear: Shield
Once you've started the mission, finding Henry is rather easy. You just have to travel to the Highlands and follow the waypoint. You'll have to go through a cave to get there. Once you are there, you'll have to kill some of Henry's minions but they aren't particularly tough by stalker standards. The real fight starts after you kill them and Henry appears.
Henry is a very, very tough stalker. You may not even be particularly threatened by Henry as she doesn't do a signifcant amount of damage. What makes Henry so tough are her shields and health which are incredibly thick and her agility. She has the same general motions that other stalkers go through but because of her size, rather than jumping a foot to the right, she'll jump the entire width of your screen, making it very hard to hit her even after fighting many stalkers.
Because of her toughness, it's very likely that she will summon more minions to fight with her. Kill them and then return your focus to Henry. When she dies, she'll cough up one of Taggarts arms. Place the box on the central rock and use the fist to open it and finish the mission.