Shield armor can create a bubble around the player for invulnerability. The player must wear the unpowered armor for 2 in game hours (2 minutes) then it becomes powered. The special ability can then be used. The armors special ability is a shield that protects the player for 30 seconds from Any damage. This is in exchange for lower defense. Only wearing the full can power it and provide the shield.
Crafting[]
Helmet:6 shroomite bars 13 ectoplasm and 2 cloryphyte bars.
Breastplate:8 shroomite bars 16 ectoplasm 3 cloryphyte bars.
Boots: 4 shroomite bars 10 ectoplasm 1 cloryphyte bar.
Crafted at a Cloryphyte anvil.
Stats[]
Helmet:9 Defense
Breastplate:10 Defense
Boots:8 Defense
Also See[]
http://terrariafanideas.wikia.com/wiki/Force_Field_Generator