In Impossible Creatures, electricity is one of the two resources required to create combined creatures and henchmen, construct buildings and research various upgrades. The other resource is Coal.

Electricity is gathered by the Lightning Rod and Electrical Generator, the former shown in the image to the right. The player begins with a small amount of electricity, but more must be gathered to support their economy.

A combined creature's electricity cost is influenced by its abilities. A creature with several abilities and/or very powerful ones, such as Loner, will cost much more electricity than one that has no special abilities.

From Insect Invasion onwards, a Workshop can convert electricity into coal and vice-versa, but a player will not get 100% value for it; for example, 50 electricity is converted into 15 coal.