Head mutation
+1 Thorns.
spiked head
Most records are titled only by body part, such as Body Mutation or Eye Birth Defect. About half (379) also carry a developer label like Rock Bod, which is shown here as a community label rather than an official name.
Thorns
Mutations
Mutations and birth defects by body part, with the stat change or effect on each.
Data updated
Rock Bod is +1 CON and nothing else. That is a typical mutation: a small stat shift, sometimes a battle effect on top. The list holds 707 mutations and 53 birth defects, and plenty of records carry only stats with no description text at all. Tell them apart by the body part in the name, then read the numbers.
Birth defects are the 53 entries marked as defects rather than mutations. They sit in the same body-part slots, so you can compare a defect against the mutation it competes with.
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