Gigante Secret Room

This new mission was added in v9.8.1. See 새로워진 기간떼 섬! 신규 콘텐츠와 이벤트가 가득 for more details.

Gigante Secret Room Mission
Location: Gigante Port (I8)
Duration: 10 minutes
Participants: 1-12
Entry Cost: 1,000,000 vis (first) + cumulative 500,000 vis per entry thereafter
Reward Type: Roulette

This mission is straight-forward. Kill the crabs for Gigante Lucky Coupons, if desired. Otherwise, just kill Gullfaxi. Gullfaxi can inflict [Poison] and [Confusion] status with its skills.

Gullfaxi • Lv.112 Undead • Heavy • None • Large
Max HP 3,724,416 • AR 58 • ATK 6365 • DR 58 • DEF 132
RES • Fire 40, Ice 40, Lightning 40, Mental 40
Drops • Soul Crystal (Event), Costume Box, Gigante Lucky Coupon

Elite Palm Crab • Lv.105 Wildlife • Heavy • None • Small
Max HP 16,945 • AR 52 • ATK 261 • DR 52 • DEF 100
RES • Fire 20, Ice 20, Lightning 20, Mental 50
Drops • Gigante Lucky Coupon

Roulette (Bonus = 500,000 Vis)

• Seed (???) x1
• Sewing Kit x1
• Costume Box x1
• Shiny Crystal Chest x1
• Gigante Lucky Coupon x1-3

There is another treasure chest near the mission start point. You can try to open it by paying some vis (20,000 vis per 1% chance). The chance of successful opening is 1% at the 2nd time you did the mission. Thereafter, it cumulatively increases by 1% per previous mission attempted, i.e. 3rd time = 1% + 2%, 4th time = 3% + 3%, 5th time = 6% + 4%, etc. See ギガンテ秘密の部屋 - 報酬箱 for details.

Entry	Success	Payment	Entry Cost	Total Cost
1	0%	-	1,000,000	1,000,000
2	1%	20,000	1,500,000	1,520,000
3	3%	60,000	2,000,000	2,060,000
4	6%	120,000	2,500,000	2,620,000
5	10%	200,000	3,000,000	3,200,000
6	15%	300,000	3,500,000	3,800,000
7	21%	420,000	4,000,000	4,420,000
8	28%	560,000	4,500,000	5,060,000
9	36%	720,000	5,000,000	5,720,000
10	45%	900,000	5,500,000	6,400,000
11	55%	1,100,000	6,000,000	7,100,000
12	66%	1,320,000	6,500,000	7,820,000
13	78%	1,560,000	7,000,000	8,560,000

Lucky Coupon Exchanger

All the entry costs (vis) given to the mission can be gained from the Lucky Coupon Exchanger every Sunday by using Gigante Lucky Coupons. You can get a random amount of the accumulated vis - 10%, 20%, 50%, or 100%. You can also get White Gold Bar x1-10, Intensified Health Filler x1, Intensified Soul Filler x1, and Shiny Crystal x1. [Source]

Costume Synthesizer
The Costume Synthesizer consumes 1 Sewing Kit to exchange 2 costumes (or hats) for a random costume, including those that are featured in web games like Magic Circle. You can also get weapon costumes rarely. See Bahia Costume Synthesization Notes.

---

For interested players, see 체험 그라 현장, 리뉴얼된 아르센 단장의 비밀 금고 미션 for Arsene's Secret Vault (v9.10.1). Nobody translated this yet. It is quite confusing to understand the article without having to actually try out the mission itself. Since each "step" has 2 rooms (1 central + 1 side), it isn't very clear which room is which...