Sky Fortress

Sky Fortress
Level Range: 145+ Party Size: 1+ Time Limit: 1 hour Cooldown: 23 hours Entrance: Prontera (prt_q 249, 79) Instance Maps: 1@sthb, 1@sthc, 1@sthd Boss: Stefan J.E. Wolf Notable Drops: Sky Fortress equipment Weapon/Armor materials

Sky Fortress (also known as Sky Fortress Invasion) is an advanced instance where players assault a floating fortress that has been spawning monsters attacking Prontera. With the help of Scientist Doyeon, adventurers must infiltrate the fortress and destroy the threat at its source.

Overview

Prontera is under siege from monsters spawning endlessly from a mysterious floating fortress. Scientist Doyeon has been studying the fortress and believes she can open a portal to allow adventurers inside. Players must navigate the fortress, defeat its defenders, and confront Stefan Jack Earnest Wolf, the golem guardian.

Quick Info

Instance Information
Level Requirement	145+	Cooldown	23 hours
Party Size	1-12 players	Time Limit	1 hour
Location	Prontera (prt_q)	Instance Maps	1@sthb/c/d

Requirements

Requirement	Details
Level	Base Level 145+
Party	Party leader must create instance
Weight	Must have inventory space

How to Access

Travel to Prontera (prt_q area).
Find Scientist Doyeon at coordinates (249, 79).
Listen to her explanation about the Sky Fortress.
As party leader, select "Enter the Sky Fortress."

"I think I can open the warp, at least for once, with the magic that I've been collecting so hard."

— Scientist Doyeon

Instance Walkthrough

Phase 1: Fortress Entry

Enter the Sky Fortress through Doyeon's portal.
Navigate the fortress corridors.
Clear mechanical and magical enemies.

Phase 2: Fortress Interior

Progress through multiple areas of the fortress.
Face various fortress defenders.
Solve any obstacles to advance.

Phase 3: Boss - Stefan J.E. Wolf

Stefan Jack Earnest Wolf (ID: 3484) is a powerful golem guardian:

"Guard...the Sky Fortress...Immortal...beings..."

— Stefan J.E. Wolf

Boss Mechanics

High Defense - Stefan is a golem with strong physical defense.
Guardian Role - Protects the fortress core.
Multiple Phases - Battle involves different stages.

Completion

After defeating Stefan:

The fortress threat is neutralized.
Collect rewards from the battlefield.
Return to Doyeon for additional rewards.

Monsters

Monster	Notes
Fortress Defenders	Various mechanical enemies
Stefan J.E. Wolf (#3484)	Boss - Golem Guardian

Rewards

Boss Drops

Sky Fortress equipment
Weapon upgrade materials
Armor materials
Various consumables

NPCs

NPC	Location	Function
Scientist Doyeon	prt_q (249, 79)	Instance creation
Han	prt_q (249, 82)	Story NPC
Doek	prt_q (252, 79)	Story NPC

Quests

Quest ID	Purpose
9418	First entrance tracker
9419	Cooldown tracker

Lore

The Sky Fortress represents an unknown threat:

A floating fortress appeared above Prontera.
Monsters spawn endlessly from within.
Its origins and creators remain mysterious.
Stefan J.E. Wolf guards its secrets.

"Protecting him and destroying this fortress is what ultimately protects my family and friends."

— Han

Tips

Daily instance - 23-hour cooldown allows frequent runs.
Party recommended - Stefan is a challenging boss.
Bring varied damage - Golem has high physical defense.
Story content - Talk to Han and Doek for context.