Endless (Slave Pits)

The endless mode is a long tournament climb with a single default fighter, who keeps growing from one phase to the next.

Nine phases. Three runs through the pits, the caravan and the coliseum. Each phase is a ladder of fighters to climb, with an entry fee and a prize.
Your opponents grow gradually. First, reputation wise and how many talents they use. From phase 4 and above, their AI gets better, advancing from Normal difficulty to Hardcore difficulty seamlessly.
The game does not end there: play as long as you like and get extremely powerful... or start again if you are bored.
Change your build during your progress for a fee.