Sky Fortresshttps://irowiki.org/wiki/Sky_Fortress

Sky Fortress
Requirements
Base Level:	145+
Item(s) (Consumed):	Sky Fortress Ticket
Hunting:	Stefan.J.E.Wolf
Quest Prerequisite(s):	Room of Consciousness
Rewards
Item(s):	Chance to drop Vicious Mind Weapons

Instance Cooldown Quest Name: Attack Sky Fortress Invading Prontera
Note: You must talk to Scientist after leaving the instance to start the cooldown timer.

This instance is unlocked halfway through the Banquet for Heroes questline after completing the Room of Consciousness instance.

• This instance has a 3-day cooldown time if done through the quest NPC.
• The 3-day cooldown can be bypassed by using a Sky Fortress Ticket obtainable from the following:
• Sky Fortress Ticket 1 Hour Box
  • Level 100 reward from Clicker mobile game
  • Exchange 25 Eden Merit Badge at Merry Badger while not under VIP status
• Sky Fortress Ticket 3 Hour Box
  • Level 200 reward from Clicker mobile game
  • Exchange 25 Eden Merit Badge at Merry Badger while having VIP

Opening the box will give you a Sky Fortress Ticket that is valid for 3 hours (VIP) or 1 hour (non-VIP). With this ticket, the instance can be continuously re-run multiple times as long as you reserve the instance within the ticket validity period.

Be sure party members are prepared for this dungeon with Token Of Siegfried. The MVP at the end of this dungeon is highly difficult and often bugs out doing Earthquake with little visible warning or after he dies or as he is dying. Going in at level 145 is not recommended even though it is possible.

1. This instance begins with a copy version of the MVP, Stefan.J.E.Wolf.
   • 2025 Note - DO NOT ONE-SHOT THE BOSS OR YOU WILL BREAK THE INSTANCE! Use weaker damage to do about a rough total of 10~15% of its max HP. Once you do, the monster version will disappear and an NPC version will appear.
2. Speak to him and he will summon 3 waves of Immortal Zombie Soldier on you. The 3rd wave will also have a Sky Fortress Key Keeper (which is guaranteed to drop a Sky Fortress Key)
3. Speak to him after you have completed the waves of zombies to open a portal to the spiral staircase portion of this dungeon.
   
   
4. The staircase will spawn monsters who drop various Vicious Mind Weapons, and can spawn the Zombie Slaughter-type monster will drop a Sky Fortress Key.
   • These keys are used to open the secret rooms along the sides of the walls as you ascend the tower.
   • NOTE: there may be less keys dropped than there are secret rooms in a single run. You can save them for future runs.
     
     

     

   • There are 3 different types of rooms that contains a Treasure Chest, Immortal Cursed Knight, or Immortal Wind Ghost.
   • Each room will have a small mob of Immortal Shadows. It is best to clear them before opening the treasure chest or summoning the mini-boss.
     
     
   • There is a trick to see which portal Immortal Cursed Knight and Immortal Wind Ghosts are in.
     To use the table below, use the guaranteed key on the first door, and type /where. Then use the second and third column to find where the minibosses are. ( credits )

Sky Fortress Mini-boss Location
Coords of first room	Wind Ghost Location	Cursed Knight Location
15 96	Floor 2 Room 2	Floor 1 Room 1
16 13	Floor 1 Room 1	Floor 2 Room 1
66 96	Floor 1 Room 2	Floor 2 Room 3
66 14	Floor 1 Room 3	Floor 2 Room 2
115 14	Floor 2 Room 3	Floor 1 Room 3
116 96	Floor 2 Room 1	Floor 1 Room 2

The top floor of this dungeon features the real MVP version of Stefan.J.E.Wolf.

• While fighting him he spawns Immortal Zombie Soldiers and Immortal Cursed Zombies, moving him to one side of the room will make dealing with the monsters more manageable.
• When the MVP reaches low HP, you will need to be aware of purple splashes appearing throughout the room.
• These areas are localized earthquakes which you will have to be ready to move away from if they spawn near where you are fighting.

Once you have defeated the MVP, a portal will open in the middle of the room and take you outside where you first entered. Talk to Scientist to start the instance cooldown!

Image	Name	Level	HP	Def	Mdef	Base Exp	Job Exp	100% HIT	95% Flee	Size	Element	Race	Spawn
	Immortal Zombie Soldier	160	405,694	188	238	0	0	450	499	Medium	Undead 1	Undead	1@sthb
	Immortal Fortress Legion	160	405,694	150	83	15,464	12,888	450	510	Medium	Undead 1	Demon	1@sthb
	Sky Fortress Key Keeper	160	423,332	129	58	0	0	450	499	Medium	Undead 2	Undead	1@sthb
	Immortal Zombie Assault	160	405,694	104	61	15,464	12,888	450	468	Medium	Undead 1	Undead	1@sthb
	Immortal Cursed Zombie	160	405,694	123	50	15,464	12,888	446	639	Medium	Undead 1	Undead	1@sthb
	Stefan.J.E.Wolf	160	20,000,000	146	30	96,453	109040	417	575	Large	Undead 1	Undead	1@sthd

Source: Divine Pride

Image	Name	Level	HP	Def	Mdef	Base Exp	Job Exp	100% HIT	95% Flee	Size	Element	Race	Spawn
	Immortal Cursed Knight	160	10,000,000	178	48	47,986	46,416	463	570	Large	Dark 2	Formless	1@sthc
	Immortal Wind Ghost	160	10,000,000	136	72	47,986	46,416	428	589	Medium	Wind 2	Demon	1@sthc
	Immortal Nightmare Shadow	160	423,332	34	34	14,059	13,590	421	462	Large	Dark 1	Demon	1@sthc
	Immortal Angry Shadow	160	405,694	104	61	14,059	13,590	499	564	Medium	Dark 1	Demon	1@sthc
	Immortal Death Shadow	160	405,694	123	50	14,059	13,590	477	472	Large	Dark 1	Demon	1@sthc

Source: Divine Pride

For more information about the drop table and possible enchantments on the Vicious Mind Weapons, please check Vicious Mind Weapon Enchants

Episode 16.1 - Instance
Ep 16.1 The Royal Banquet Main Page
Mini Boss Portal Locations

Instances
Hourly	Hazy Forest • Infinity Space • Orc Memory Dungeon • Octopus Cave • Sealed Shrine • VIP Summoner
Daily	2nd OS Search  • Airship Crash Site  • Airship Infiltration (Ep19)  • Airship Raid  • Bagot's Labratory  • Buwaya's Cave  • Central Laboratory  • Charleston Crisis  • Cor Memorial  • Devil's Tower  • EDDA Fall of Glast Heim  • EDDA Somatology Laboratory  • Faceworm Nest  • Geffen Magic Tournament  • Ghost Palace  • Hey, Sweetie!  • Floating Garden  • Horror Toy Factory  • Isle of Bios  • The Last Room  • Memories of Thanatos  • Morse's Cave  • Nightmarish Jitterbug  • Old Glast Heim  • Sanctuary Purification  • Sara's Memory  • Temple of Demon God  • Room of Consciousness  • Heart Hunter War Base 2  • Villa of Deception  • Werner Laboratory Central Room
3 days	Sunken Tower • Advanced Old Glast Heim • Airship Crash • Challenge Mode Old Glast Heim • Geffen Night Arena • Nidhoggur's Nest • Sky Fortress • Wolfchev's Laboratory • Constellation Tower
Weekly	Bakonawa Extermination • Bangungot's Instance • Beginner Old Glast Heim • Endless Tower • Sarah and Fenrir
Various	Malangdo Culvert