Sky Fortress Invasion¶
Guide¶
A fortress floating above invaded Prontera keeps spawning undead. Scientist Doyeon opens a warp into it, and your party has to fight through the fortress and destroy the golem Stefan.J.E.Wolf. Along the way you can collect keys that open side rooms with treasure and two optional bosses.
How to enter¶
- NPC: Scientist Doyeon in invaded Prontera,
/navi prt_q 249/79. The Fortress Entry Warp Portal is next to her at/navi prt_q 243/75. - Level: Base Level 145 or higher. You also need some free inventory space to talk to Doyeon.
- Party: The party leader talks to Doyeon and picks "Enter the Sky Fortress." (later runs: "Yes"). Then everyone steps into the portal.
- Cooldown: After your first run, talk to Doyeon again to report. This completes the quest and starts a cooldown that ends at 04:00 server time three days later ("Attack Sky Fortress Invading Prontera"). The first time you report, you also get a 1-hour Sky Fortress Ticket #14505.
- Skipping the cooldown: With a Sky Fortress Ticket (Sky Fortress Ticket #14505 or Sky Fortress Ticket #14506), the leader can pick "Show the -Dungeon Pass-" to open the fortress during the cooldown. Members use "Put the - Dungeon Pass - near to the warp" at the portal. A second portal in the Dimensional Gap (
/navi dali02 115/61) also takes ticket holders in. Entering with a ticket does not change your cooldown, and the ticket is not used up.
Step 1: The courtyard¶
You arrive at the fortress gate. Walk forward a few steps and 
Stefan.J.E.Wolf #3484 appears. Once his HP drops below 19,000,000, he retreats, and the fortress sends three waves of 8 
Immortal Zombie Soldier #3476. The last wave includes a 
Sky Fortress Key Keeper #3478.
When the waves are cleared, walk up to Stefan at 64/67. He leaves, and the rest of the fortress opens:
- the stairs at
73/71, which lead to the upper floor - the warp at
93/77to the east wing (210/96) - the warp at
190/54in the east wing, which leads to Stefan's room (the final boss) - six Deactivated Warps to the side rooms
Walking into the corridors and the east wing triggers groups of 
Immortal Fortress Legio #3477, 
Immortal Zombie Assault #3479 and 
Immortal Cursed Zombie #3480. Each group has a 20% chance to include another Key Keeper.
Keys and side rooms (optional)¶
Every Sky Fortress Key Keeper #3478 drops a Sky Fortress Key #6960. Use a key on a Deactivated Warp to activate it. Each warp leads to one of six rooms, and the warp-to-room order is shuffled every run.
| Room | What happens | Reward |
|---|---|---|
| 4 Shadow rooms | 10  Immortal Nightmare Shado #3481 or  Immortal Angry Shadow #3482 spawn. Kill them all |
A Sky Fortress Gold Treasure (party leader opens) |
| Cursed Knight room | Several  Immortal Death Shadow #3483 spawn and a treasure box appears |
The leader opens the box to summon  Immortal Cursed Knight #3474 |
| Wind Ghost room | Several Immortal Death Shadow #3483 spawn and a test tube appears |
The leader examines it to summon  Immortal Wind Ghost #3475 |
The Gold Treasure gives the party leader one item:
| Item | Chance |
|---|---|
| Elunium #985 | 32% |
| Oridecon #984 | 32% |
| Yggdrasil Seed #608 | 20% |
| Yggdrasil Berry #607 | 10% |
| Old Card Album #616 | 5% |
| Mystical Card Album #12246 | 1% |
Final boss: Stefan.J.E.Wolf¶
Take the warp at 190/54 and walk toward the center of the room. 
Stefan.J.E.Wolf #3473 awakens with 20,000,000 HP.
- Between 14,000,000 and 6,000,000 HP: Immortal Zombie Soldier #3476 keep spawning in groups of 3, up to 8 at a time.
- Below 5,000,000 HP: Those adds disappear. Pairs of
Cursed Soldier of Bijou #3485 spawn every 8 seconds. - Ground-shaking zones (below 5,000,000 HP): Every 6 seconds, several spots around the room shake with a 4-second warning bar. Then each spot becomes deadly for a moment, and anyone standing in it dies instantly. Move as soon as a warning appears under you.
When Stefan dies, the remaining adds vanish and the Sky Fortress Escape Warp appears in the middle of the room.
Rewards¶
- Boss drops from Stefan and the optional bosses.
- Gold Treasures from the side rooms (see above).
- 20–40 Instance Points when you leave through the Escape Warp. This counts toward the daily 1,200 cap. The warp takes you back to where you entered (Prontera or the Dimensional Gap).
Overview¶
- Entrance: Scientist Doyeon at
prt_q 249/79(/navi prt_q 249/79) or Fortress Entry Warp Portal atprt_q 243/75(/navi prt_q 243/75) - Requirements: Level 145+, time limit 1h
- Entry: Repeatable, resets at 04:00 after 3 days.
- Who can enter: Party (create a party first)
Bosses¶
Drop chances include Miracle's drop rates.
Stefan.J.E.Wolf #3473
MVP · Level 160 · 20,000,000 HP · Undead · Undead 1 · Large · Full monster entry
| Item | Chance | |
|---|---|---|
| Old Blue Box #603 | 50% | MVP reward |
| Old Purple Box #617 | 50% | MVP reward |
| Old Card Album #616 | 20% | MVP reward |
| Juliette D. Rachel [2] #28010 | 0.05% | |
| Lindy Hop [2] #21018 | 0.05% | |
| Sunflower Kid [2] #2027 | 0.05% | |
| Yggdrasil Berry #607 | 100% | |
| Yggdrasil Seed #608 | 100% | |
| Oridecon #984 | 100% | |
| Elunium #985 | 100% | |
| Stephane Jack Earnest Wolf Card #31026 | 0.5% |
Stefan.J.E.Wolf #3484
Boss · Level 160 · 20,000,000 HP · Undead · Undead 2 · Large · Full monster entry
No drops.
Immortal Cursed Knight #3474
Boss · Level 160 · 10,000,000 HP · Formless · Dark 2 · Large · Full monster entry
| Item | Chance | |
|---|---|---|
| Lindy Hop [2] #21018 | 1% | |
| Old Card Album #616 | 50% | |
| Yggdrasil Berry #607 | 100% | |
| Yggdrasil Seed #608 | 100% | |
| Oridecon #984 | 100% | |
| Elunium #985 | 100% | |
| Immortal Cursed Knight Card #31024 | 0.5% |
Immortal Wind Ghost #3475
Boss · Level 160 · 10,000,000 HP · Demon · Wind 2 · Medium · Full monster entry
| Item | Chance | |
|---|---|---|
| Sunflower Kid [2] #2027 | 1% | |
| Old Card Album #616 | 50% | |
| Yggdrasil Berry #607 | 100% | |
| Yggdrasil Seed #608 | 100% | |
| Oridecon #984 | 100% | |
| Elunium #985 | 100% | |
| Immortal Wind Ghost Card #31025 | 0.5% |
Sky Fortress Key Keeper #3478
Boss · Level 160 · 423,332 HP · Undead · Undead 2 · Medium · Full monster entry
| Item | Chance | |
|---|---|---|
| Sky Fortress Key #6960 | 100% |
Monsters¶
| Monster | Level | HP | Race | Element |
|---|---|---|---|---|
| Immortal Zombie Soldier #3476 |
160 | 405,694 | Undead | Undead 1 |
| Immortal Nightmare Shado #3481 |
160 | 423,330 | Demon | Dark 1 |
| Immortal Angry Shadow #3482 |
160 | 388,054 | Demon | Dark 1 |
| Immortal Death Shadow #3483 |
160 | 423,330 | Demon | Dark 1 |
| Immortal Fortress Legio #3477 |
160 | 405,694 | Demon | Undead 1 |
| Immortal Zombie Assault #3479 |
160 | 405,694 | Undead | Undead 1 |
| Immortal Cursed Zombie #3480 |
160 | 405,694 | Undead | Undead 1 |
| Cursed Soldier of Bijou #3485 |
160 | 405,694 | Undead | Undead 1 |
Rewards and quest items¶
Items the instance NPCs hand out, including quest items used along the way.
| Item | Amount |
|---|---|
| Sky Fortress Ticket #14505 | 3600 |
| Elunium #985 | 1 |
| Oridecon #984 | 1 |
| Yggdrasil Seed #608 | 1 |
| Yggdrasil Berry #607 | 1 |
| Old Card Album #616 | 1 |
| Mystical Card Album #12246 | 1 |