Reroll 5 times. You gain a 1-shot ability of each roll.
Clarifications:
Factional abilities are not inherited
If any vanilla is rolled, that shot is forfeited (So rolling VT 5 times essentially makes you a JOAT with no abilities)
Any passive abilities become active
If a role allows multiple choices (e.g. another JOAT), you can use any of the abilities, but one time abilities. For example, if you roll #1348, for that shot you can choose to be a Doctor, Roleblocker or Jailkeeper, but once per game only.