Power fist
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A Power Fist is much as its name states. It is simply a fist shaped gauntlet surrounded by an energy field that disrupts solid matter. It is large, and as such slow in combat, and so the bearer must be willing to take damage before they can strike back.
The benefits of the power fist are that it increases the user's strength, much like Power Armour due to the extra power put in by the electronics designed to allow it to move.
It is most commonly found fitted to Space Marine Tactical Dreadnought Armour. Officers from the Imperial Guard may also take them, bionically grafted onto their skin.
Commissar Yarrick is most famous for his power claw, which he took from an Ork Warboss who was taking part in a Waagh! under his enemy Ghazghkull Thraka. Other armies also make use of the power fist including Chaos Space Marines, Sisters of Battle, and Eldar. The Orks use a similar device known as a Power Klaw which is a large claw with three bladed fingers and another similar device used on Space Marine Dreadnoughts called a Power Claw has the same effect as a Power Fist.
A variant of this is the Chainfist, which is similar to a power fist but with a miniature chainsaw blade attached.
