A unicorn horn for Zheng3's excellent headband - made in Fusion360 but mixed with the negative peg shape in TInkercad. I should have made the socket about 1% bigger as it's a little tight as is, but there's no danger of it falling off & turning a unicorn into a regular boring horse...
Printed in green glow-in-the-dark PLA for extra magicness, with the band in CPE for cope-with-anything toughness.