Resilient Metal 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
Resilient Metal is a rank 9 Hillwen Engineering recipe with a best success rate of 100% at rank 1 and dan ranks.
Materials
Each craft uses
5× Malleable Metal Shard — Farm it from Bri Leith or Leannan shadow missions.
1× Enchanted Melding Agent — Buy from Leannan's shop in Bri Leith for 500,000 gold.
1× Pure Gemstone — Craft it with Magic Craft using Gemstone Powder from fragmenting Ascension Gems.
6× Hard Crystallized Mineral — Drops from Feth Fiada, Revived Illusion, or Seven Nightmares on Hard difficulty.