Lamia

Lamia is a creature type introduced in Journey into Nyx.

Theros
Lamias are female monsters created when powerful emotions caused by the gods' actions consume a mortal's mind. Nyxborn creatures, lamias will themselves into being with wildly varied physical forms reflecting the creature's twisted imagination. Some lamias appear to have scaly, bestial bodies and humanoid faces (Thoughtrender Lamia). Others feature serpentine appearances vaguely resembling naga (Gravebreaker Lamia).

Trivia
According to mythology, Lamia was a mortal queen cursed by the goddess Hera and transformed into a monster who hunted and devoured children. In later traditions and storytelling, the lamia became a type of phantom, which seduced youths to satisfy their sexual appetite and fed on their flesh afterward.