Kahn Pumpkin Carving.
Alex Wer, aka The Pumpkin Geek, makes the coolest Star Trek Pumpkin Carvings. This series is focused on villains.
Klingon Pumpkin Carving
Borg Queen Pumpkin Carving
Gul Dukat Pumpkin Carving
Admiral Alidar Jarok Pumpkin Carving
From the Star Trek: The Next Generation episodes “The Defector”.
Locutus of Borg Pumpkin Carving
Q Pumpkin Carving
While Q was Picard’s nemesis, I don’t consider him a villain.