From Nexon which isn't the best but the game is already out in Korean (Mabinogi Heroes). Yes it is related to Mabinogi but the gameplay and style is totally different.
Its going to be a Diablo style action RPG with a world a lot like DDO. (central hub town, instanced dungeons)
Its going to have partially destructable environments. It takes a page from Champions with the ability to use the broken bits of the environment as weapons.
The combat in the video looks really good for a variety of characters. Its got a God of War vibe with the combos and the heavy gore.