While the new character, Hurk, is the first part of Season 2 Episode 3’s content update, Action Shock I is aimed at introducing a new area as well as some changes to combat.
First off, the new area is roughly known as Mist Peaks, with new monsters and elite ones dropping loot found from reward chests (those that appear after completing a stage).
The new version for Mabinogi Heroes will also introduce a new score system, with critical damage and attack speed/ rate taken into account as well. There are a couple of other new features, such as PvP rewards and “lucky” system where a monster may drop tons of gold at random.