Enhanced Hillwen Alloy 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
Enhanced Hillwen Alloy is a rank A Hillwen Engineering recipe with a best success rate of 98% at rank 1 and dan ranks.
Materials
Each craft uses
2× Hillwen Alloy
20× Ancient Golden Crystal — Buy Baltane Supply Boxes or get drops from the Mokkurkalfi raid.