Can be opened with a key, or by making an offering of 666,666,666 coins or 6 gems. A more powerful gate can be opened with a demon orb, which can be obtained from a rare drop by demons, or from a mystery box.
Each gate contains 20 demons and a gate boss, or 99 and a boss if in guild. The boss HP is also doubled if in guild. Since most players encounter these bosses as guild members, the table below lists the HP when in guild. The boss HP also seems to vary, the reason for this is not known but may be dependent on the number of players in guild when the gate is opened.
|Name||Normal gate||Orb gate|