Beast of the Week: Yothga

Taking more inspiration from REH, here's one of the denizens of Tsotha-lanti's dungeons below the Scarlet Citadel, the Yothga.

Yothga
Armor Class: 8 (12)
Hit Dice: 3*
Move: nil
Attacks: 2 vines
Damage: 1d6 + special
No. Appearing: 1d4 (2d4)
Save As: Fighter 3
Morale: 12
Treasure Type: nil
Alignment: Chaotic
XP: 50

Yothgas are large, intelligent vines with narrow, pointed leaves and unnatural red flowers.  They are said to come from Hell, the Dimension of Nightmares, or the cursed planet Yag.  None know for certain.  A Yothga is immobile, but can lash out with its vines up to 30' away.  Those hit by the vines must Save vs. Spells or suffer the effects of a feeblemind spell (Int becomes 3) until released from the plant's grasp.  Spellcasters ensnared by a yothga lose their spellcasting ability for 1d6+6 Turns after being released, as the plant feeds on mental energy.  If destroyed but not uprooted, the Yothga can regrow in 1d4 weeks.  Rumors warn that uprooting one is dangerous, though, as the roots go down to Hell, and strange things may be pulled up with a yothga's roots.