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[[Summary::Certain lifeforms have the capacity to generate large amounts of metabolic energy that can be used for many different purposes.]] Such a creature's ''bio-energy pool'' can contain a maximum amount of charges equal to 3 plus the creature's [[SRD:Constitution|Constitution]] modifier (minimum 1). These charges may be expended to facilitate certain special powers. Some of these powers are exclusive to specific species of creatures, whereas others can be accessed through various abilities gained from feats or class features.