[nilbog]

Here is a pic of me being owned by what is in question.

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and some quotes

Amygdalan Warriors (level 48-52) - These look like....well, they look pretty unique. Picture a big weird-looking hercules type dude with an Octopus for a head. If you know what an Illithid or Mind Flayer is, that's what they look like. They are Warrior mobs, which means they have high defensive skills, high MR (Difficult to mez - priority target) and hit pretty hard. They also have the effect of Mana Sink every time they hit you
Nautilus Shield ( 7 WT, 20 AC, +5 STR, +5 DEX, +5 STA, Warrior)
Amygdalan Tendril( 9 DMG 25 DLY 2 WT, +5 STR, +4 DEX, Warrior).

Amygdalan Knights (level 48-52)- Look like Amy Warriors, but have pets, cast SK spells, and can HT your ass for a very large amount of damage. Like Amy warriors, these cast Mana Sink with every hit, and they are also able to fear. These drop Shadowknight-only Umbral Armor.
Umbral Platemail Boots ( 4.9 WT, +17 AC, +5 STR, +5 STA, +13 SVD)
Umbral Platemail Helm ( 4.5 WT, +17 AC, +9 INT, +35 HP, +10 SVM)
Umbral Platemail Vambraces ( 4.9 WT, +16 AC, +5 STR, +5 DEX, +10 SVF)
Umbral Platemail Greaves ( 5.6 WT, +17 AC, +5 WIS, +5 AGI, +13 SVP)
Umbral Platemail Bracer ( 3.0 WT, +10 AC, +3 INT, +5 DEX)
Umbral Platemail Breastplate ( 7.5 WT, +30 AC, +13 STR, +9 DEX, +9 STA)
Umbral Platemail Guantlets ( 3.8 WT, +13 AC, +5 STR, +5 INT, +35 MANA, +10 SVC)

If you are resisting it, your mana should not drop though. Not sure whats up with that.