Undine is one of the Four Spirits Luka needed to make a contract with tasked by his father Marcellus. She can be found at Undine's Spring north of Plansect Village. She will only appear after visiting Esta.
After reaching Undine, she will challenge you to a fight. After winning, she will perform the contract to allow Luka to use her power, but Erubetie will show up afterwards and also fight you. Undine proceeds to assist Luka against Erubetie, and after the fight Luka senses Erubetie's conflicts between her loyalty to the Monster Lord Alipheese XV and the current Monster Lord Alice XVI. Undine is impressed that someone like Luka manages to sense her doubts just barely after making a contract.
“A spirit who resides in a cave under Undine’s Spring, out of view of the rest of the world. A long time ago it seems as though she appeared before humans, but now she’s a shut-in.
Hating the humans who pollute the waters of the world, she mercilessly preys on any who dare enter her terrain. Absorbing them into her body, she assimilates their body to become one with hers.
Though she dislikes humans, she seems to hold regrets that humans and monsters aren’t existing in peace as they did in the past. A close friend of the Queen Slime, Erubetie, they treat each other as equals. They also seem not to interfere with each other’s dealings.”
- Slime Attack – One Foe, Normal Attack, Slimed (50%)
- Slime Gungnir – All Foes, Physical Attribute
- Heavenly Slime – All Foes, Pleasure Attribute, Slimed (75%)
- Great Flood – All Foes, Auto Hit, Water Attribute
- Aqua Shake – One Foe (Luka), Pleasure Attribute, Slimed (50%)
- Aqua Stroke – One Foe (Luka), Pleasure Attribute, Slimed (50%)
- Aqua Stroke – One Foe (F), Pleasure Attribute, Slimed (50%)
- Aqua Prison – One Foe (F), Pleasure Attribute, Slimed (50%), Bind (50%)
- Aqua Prison – One Foe (Luka), Pleasure Attribute, Slimed (50%), Bind (2 Turn Break)
- Aqua Melty – One Foe (Luka, Bound), Pleasure Attribute, Slimed (50%)
- Aqua Mirror – All Allies, Magic Reflect (100%) for 3 turns.
- Azure Stream – All Foes, Magical, Water Attribute, Learnable
Keep track of her Aqua Mirror skills, as it will reflect magic back at you. She has rather good elemental resists for a slime, but she’s still weak to Lightning and Bio. If anyone on your team has gone though the Apprentice Hero job, equipping the “Slime Slayer” ability could help you. The only viable status effects are those from time magic, and their hit rate is not reliable enough to be used save on the higher difficulties.
“You ended up being melted away anyway. The digestion lovers thank you for your hard work. Undine is the spirit of water and she uses water based attacks. She also uses pleasure attacks. Although she is strong to physical attacks, she’s weak to any other elemental magic other than water. So avoid physical and water based attacks. She’s strong to status ailments aside from those caused by Time Magic. Keep that in mind. Now go, oh Brave Luka. Once you get tired of being eaten, please try to remember your quest.”