Bhafel Slayer Circlet is crafted with Hillwen Engineering in Mabinogi. This page lists everything needed to make it, checked against the game as it exists today. The interactive planner lives in the Hillwen Companion.
Recipe availability
Bhafel Slayer Circlet is a rank 6 Hillwen Engineering recipe with a best success rate of 98% at rank 1 and dan ranks.
Materials
Each craft uses
5× Hillwen Alloy
3× Black Dragon Eyeball — Drops from the Black Dragon Raid boss fight.
1× Black Dragon Blood — Drops from the Black Dragon Raid boss fight.