Lake in Dusk

Requirements

 * Being Level 65
 * Have a Map Part in your inventory
 * Have 60 minutes free to kill without resting, that's the time that the dungeon lasts

Entry
The entrance to the dungeon is at the end of the Red Jungle in Green Despair, past the Moscutter Queens:

You must have a Map Part in your inventory to enter.

Map
There is no in-game map of the dungeon, but someone has made this map here:

It may help if you get lost.

Weapon
Titanium

Shadowtitanium

Pherystin

Aqua orb(Super Rare)

Armor
Titanium set (+0, +1, 1 slotted)

Shadowtitanium set (+0, +1, +2, +4, 1 slotted)

Accessory
Earring of Bless +0, +1

Adept Bracelet +0, +1

Life Regeneration Amulet +2 (Rare)

Mana Regeneration Amulet +2 (Rare)

Atlas Amulet +0

Other
0-5 X Upgrade Core(Medium) UCM

0-3 X Force Core(High) FCH

UCM + FCH = 1-7 per round (usually 1-4 per round)

Extract Potion (STR, DEX, INT)

Slot Extender(Medium)(Only Zigdris, Super Rare)

Illusion Coral (drop from Venom Toads, Orcs(of all kinds), and Harpys, Super Rare) Upgrade Core (High) UCH(Super Rare)

Video Walkthrough
Lake in Dusk Guide