Energy shield
From Marvel Database
Energy shields are contained in devices worn on the wrist or contained in a gauntlet. When needed the device is activated and the shield 'expands' from the emitter.
History
The earliest form was used by a member of the Raiders and later adopted by Iron Man. These emitted photons into a small round shape and were generally a supplement to the rest of their armor's defenses.
A second photon shield design was made for US Agent by Stark. SHIELD also developed a cooled plasma design. Captain America (Steve Rogers) briefly used the plasma shield while in exile. Not only were they useful protection, but the shields could be used as controllable projectile weapons.
On Counter-Earth/Heroes Reborn, Rebecca Barnes used a Vibranium-powered triangular energy shield.
An updated version of the plasma shield with a flexible containment matrix was given to Captain America (Steve Rogers) by Sharon Carter while his normal shield was being repaired. This shield can be morphed into other forms if needed, such as a staff, sword, or rope. It could even take on the design of his old shield. He later gave this shield to the time traveler Primax.
Taskmaster also acquired a similar device from SHIELD. Not only does it supplement his Adamantium dupe of Captain America's Shield, but Taskmaster has used it for 'energy claws' and to simulate Spider-Man (Peter Parker)'s webshooters.
Iron Man's S.K.I.N. Armor incorporated an energy blade that can also double as a shield.
