Two practice dummies stand in Dungeon. They exist so you can test a build without hunting for something that survives long enough to be useful - swing at a dummy instead, for as long as you like.

Both commands work from any map. No level requirement, no reset requirement, no zen cost - a fresh character can walk in on day one.

• Combo practice - the dummy has an enormous health pool and does not regenerate, so a Blade Knight can run a full combo rotation start to finish, over and over, without killing it. This is the reason the spots exist.
• Damage testing - change gear, sockets, wings or buffs and compare your numbers against the same target every time.
• Skill testing - every class can hit it. Only the combo itself is BK-specific; anyone can park there to watch what a spell actually does.