Its supposed to be the D&D5e Hydra out of the Monster Manual.
Please note that in the picture i printed the heads seperatly on a resin printer, so results might be different and the print settings dont account for those.
Printer Brand:
Prusa
Printer:
Rafts:
Yes
Supports:
Yes
Resolution:
0.1mm
Infill:
15%
The Hydra after sprayed with grey color.