There are many different types of items available for use in City of Villains and Heroes. The items mentioned here are all in both associated games.
Inspirations
Inspirations are used by players in the game as temporary power ups for different stats or abilities. They are acquired by killing enemies, or buying for a small price from a Quartermaster. They are very common, but some are a bit more rare, and more expensive than others. The different stats that can be modified using these 30 to 60 second power ups are:
  Damage of all abilities, making your character deal more hit points worth of damage
  Accuracy of all abilities, making your character hit more often
  Resisting all status effects that could prevent you from attacking/moving
  Defence, making your character harder to hit
  Resistance, making your character take less damage
There are also inspirations that can boost other things than stats. Such as:
  A boost to your health
  Resurrection after death, penalties for dying will still apply
Power ups in this regard are used to get out of tough situations, or just to complete a mission faster, or easier.
Enhancements
Enhancements are permanent bonuses to specific powers. They are obtained by killing enemies, or buying from a Quartermaster, and are more rare and expensive than Inspirations. They get more expensive the higher level your character is. When an enhancement is applied to a power, it is locked into that power, and cannot be removed. It can, however, be overwritten, by just applying a different one. When overwritten, the enhancement previously locked into the power is lost, and cannot be recovered. Enhancements can alter all different stats and are permanent, but can only affect one power, and until the higher levels, do not affect them as much as Inspirations.
Salvage
There are 2 main types of salvage, and base salvage will be covered here. Invention salvage is covered in the 'Invention' section. Base salvage was mentioned above, in the base section, and can be used with base workshops and creation units to make base items and other items for personal and Supergroup use.