The MU Helper is the built-in auto-play assistant - open it in game, set your skills, potions and pick-up rules, and your character farms the spot on its own.

• Free for everyone, from level 1, on every server. No unlock, no fee, no VIP requirement.
• Using it is fully allowed - it is part of the game, and the economy (see Rewards) is tuned assuming people farm with it.
• Offline Helper - keep farming after you disconnect - works on the VIP server only. Note that offline time does not count toward the hourly online coin rewards.