Destructive Gloves (M) is crafted with Tailoring in Mabinogi (gloves). This page lists everything needed to make it, checked against the game as it exists today. The interactive planner lives in the Tailoring Companion.
How to get the sewing pattern
The sewing pattern is rank 1 and survives 30 uses; every crafting attempt spends one use.
Rabbie Phantasm Dungeon Reward: Clear the Temptation's Path difficulty of Rabbie Phantasm for a chance at cloth sewing pattern fragments to combine.. Requires a Rabbie Phantasm Dungeon Pass and an equipment level of at least 120, with 380 recommended for Temptation's Path.
Rundal Advanced Hardmode dead-end chest: Run Rundal Advanced Hardmode and open the hallway dead-end chests for a chance at Destructive gear sewing patterns.. Enter through the Rundal Hardmode Dungeon altar with a party of up to eight.
Ciar Veteran dead-end chest: Clear Ciar Veteran and open the chests sitting in hallway dead ends. Requires a Ciar Veteran Fomor Pass placed on the Ciar Dungeon altar
Materials
Expect about 6 attempts per finished item (18% average progress per attempt). Per-attempt materials are consumed on every attempt; finishing materials once per item.