The shipwreck in the north east of Tartessos can now be accessed (with a bit of effort). Lots of treasure, some pirate opponents, secret puzzles, and an arena with very unique rewards, and a very unique host. Also, special arena rules... (water creatures can walk over tiles you can't. and take much less physical damage because they are mostly submerged).
And the biggest (and hardest) arena reward is a new type of unique item: it is alive, and slowly levels up (increasing its abilities, and gaining new ones).
Changed files in this update