…the god-intoxicated celebrants draw milk and honey from the streams. They strike rocks with the thyrsus, and water gushes forth. They lower the thyrsus to the earth, and a spring of wine bubbles up. If they want milk, they scratch up the ground with their fingers and draw up the milky fluid. Honey trickles down from the thyrsus made of the wood of the ivy, they gird themselves with snakes and give suck to fawns and wolf cubs as if they were infants at the breast. Fire does not burn them. No weapon of iron can wound them, and the snakes harmlessly lick up the sweat from their heated cheeks. Fierce bulls fall to the ground, victims to numberless, tearing female hands, and sturdy trees are torn up by the roots with their combined efforts…
Walter Friedrich Otto: Dionysus: Myth and Cult

Maenads are member of the Thiasos, the reveling retinue of Dyonisus. The frenzy of their god-inspired ecstasy sometimes makes them join bands of adventurers. This should be strictly a female class but it’s much better if not.
Levels, saves, hits and combat: like a MU/Caster of the same level. They save as clerics, because they are crazy cultists. Literally.
Virtue of the Ravenous Reveller: Maenads eat human flesh and are drunk almost all the time. Unrelated to their diet, at level 1, 3, 5, 7, 9, 11 the maenad learns one of the following powers:
- Wielding the Thyrsus: the maenad can strike their thyrsus to the ground to create enough water, honey, milk and wine to satiate and/or inebriate six humans. For every level gained after the power is learnt the thyrsus generates enough for six more humans.
- Suckling the Beasts: the maenad can charm mammals once per day for 1d6 hours. By suckling the charmed victim the maenad can make this charm permanent for up to 2 levels of charmed mammals. For every level gained after the power is learnt 2 more levels can be permanently charmed. Male maenads lactate too, of course.
- Girthing the Serpent: the maenad can charm a snake once per day. If successful the snake will coil around the maenad: while coiled the snake will leave the maenad to attack anybody attacking the maenad in melee. The snake, at dawn, will wake up the maenad and leave if it’s of level more than 1, plus 1 for every level gained after the power is learnt.
- Withstanding the Flame: the maenad is immune to fire damage.
- Tearing the Flesh: the maenad can exacerbate her frenzy and for the next turn do a bare handed tearing/grappling attack. This attack strikes as a magic weapon and deals 2d6 damage to living creatures. For every level gained after the power the maenad can enter frenzy an extra time per day.
- Ignoring the Iron: the maenad can’t be cut by iron and steel weapons. Non-bludgeoning iron weapons deal 1d4 damage instead.
So, yeah, if you wonder what’s the kind of content you can find in the Chthonic Codex, this is it. The Codex tends more to weird/faerie tales though.