The first challenge tests the artists ability and the second challenge is to cover bad ink with new art.
Cam Pohl seeks revenge after being stabbed in the back by Pon in Season 12, and Season 11 rivals Kyle Mackenzie and Tim Stafford put their versatility to the test.
It's predator versus prey when two epic "Ink Master" feuds come to a head; Angel Rose fights back against her Season 11 thorn, Jimmy Snaz; Season 10's Sparks returns to burn competitor Jason Elliott.
Using live models as inspiration, the artists create classic pin-up girl tattoos; tensions rise when the artists must swap designs.
Season 12 rivals Alexis Kovacs and Ash Mann look to settle unfinished business, while Master Anthony Michaels tries to tame the trash-talking winner of Season 10, Josh Payne.