For the really veteran online gamers, you would have heard of an old 2D MMORPG call Mix Master, which is still running in some European countries. Developed by Korean studio Aurora Games, Hench is the spiritual sequel to Mix Master.
In Mix Master, players collect monsters known as “Hench” to fight alongside them, and of course mix them into stronger ones. This core system is still in Hench, although with a different storyline and world view. However, some of the original characters and monsters will be appearing in Hench.