Specimen cards are the test subjects in your game that are later replaced by corresponding Mutant cards when you ‘mutate’ them. Specimens have two unique mutations which take effect when a particular combination of Radiation cards are placed to the left, or ‘attached,’ to them. You can tell which Specimens mutate into which Mutants by looking at a Specimen’s Mutant Numbers, which are located to the right in unique test tube icons.
Specimen cards have two stats called Power and Stability. Power measures the amount of damage it inflicts. Stability measures the creature’s constitution.