Location: Talk to Scientist Doyeon at [prt_q,249,79] to start the Sky Fortress instance.

Requirements: - Base Level: 145 or higher. - You must be in a party to enter the instance. - You need a Dungeon Pass (Item ID: 14505) or a Sky Fortress Ticket (Item ID: 14506) to enter.

Cooldown: After completing the instance, there is a 23-hour cooldown before you can enter again.

The Sky Fortress instance is a dangerous mission to stop the continuous invasion threatening Prontera. Follow the steps below to complete the instance:

1. Starting the Instance

1. Speak to Scientist Doyeon. She will provide background on the Sky Fortress and explain the threat to Prontera.
2. The party leader should activate the instance by choosing “Enter the Sky Fortress” after providing the Dungeon Pass or Sky Fortress Ticket.

2. Navigating the Sky Fortress

1. You will enter a series of rooms and face powerful enemies such as Immortal Zombie Soldiers (ID: 3476) and Immortal Cursed Zombies (ID: 3480). Clear the enemies to progress further into the fortress.

3. Mid-boss Encounter - Stefan J.E. Wolf

1. You will face Stefan J.E. Wolf (ID: 3484), a powerful enemy who is protecting the Sky Fortress. Defeat him to unlock more areas and continue deeper into the fortress.

4. Final Boss Fight - Immortal Cursed Knight and Immortal Wind Ghost

1. In the final rooms, you will face both the Immortal Cursed Knight (ID: 3474) and Immortal Wind Ghost (ID: 3475). Coordinate with your party to defeat these strong bosses.

5. Completion

1. After defeating all enemies, you will be rewarded with various items, including the chance to receive rare treasures from Sky Fortress Gold Treasure Boxes scattered throughout the instance.

1. Party Setup: A tank, healer, and DPS are recommended due to the large number of strong enemies and bosses.
2. Boss Strategy: Spread out to avoid heavy damage from AoE attacks, and focus fire on the bosses to bring them down quickly.
3. Cooldown: After completing the instance, there is a 23-hour cooldown before re-entry.

Good luck exploring and conquering the Sky Fortress!