Ok, so I'm working on a test for the serum.
When dosed with the immortality serum, the target must make a BOD+WIL [Physical] (18, 1 week) Extended Test. 2 or more net hits means the target suffers no side effects. Less than 2 net hits means the target suffers an abberant genetic mutation (similar to a changeling). A glitch results in the target suffering several genetic mutations. A critical glitch results in the target's death.
OR
BOD+WIL [Physical] (16) Test
0-1 net hits: negative mutation
2-3 net hits: nothing
4-5: random positive
6+ selected positive
Which one sounds better?