The euryale is an ancient medusa that has transformed over millennia into something far more dangerous. With the body of a snake and the strength of a giant, the euryale is rightly feared more than any common medusa.

Ancient Medusa#

To become a euryale, a medusa must avoid death for thousands of years. Moreover, they must never catch a glimpse of their own cursed reflection. Like many monstrous magical creatures, medusae become more formidable with age, as they gain in both raw power and the wisdom to master that power. The ability to out-think and outmaneuver countless foes over centuries is also a testament to their cleverness, making the medusa more likely to gain the cooperation of a fiendish patron who can magnify their strengths even further.

Corrupted Beauty#

More monstrous than other medusae, a euryale’s human aspects have almost entirely vanished. Its previous weak, humanoid body has been replaced with a massive snake-like torso, and its muscular, scaly arms possess strength rivaling a hill giant. The euryale’s serpentine body can encircle and crush smaller creatures with ease. Barbed, venomous quills line the bodies of some euryales, and these quills can be detached and used as arrows to strike at foes that stand out of reach.

Fiendish Pact#

Time alone is not enough to transform a medusa into a euryale. Those that wish to gain greater power must seek out a mighty malevolent entity, such as a demon lord or an archdevil. The medusa may agree to perform specific tasks or pledge servitude to such a creature in exchange for its magic. In other cases, capricious beings may transform the medusa for no better reason than their own amusement, hoping to unleash chaos upon the Material Plane. The rare euryale that does not consent to this change often goes mad, leaving its lair to seek vengeance upon whichever unfortunate souls it happens to encounter.