Does armour made from a monster with resistance keep the resistance?
For example, a PC kills some Gricks and makes their skin into leather with his Leatherworker's kit.
The Grick's statblock says it has
Damage Resistance: Bludgeoning, Piercing, and Slashing From Nonmagical Attacks
Is it possible to create light armor with that resistance from tanned Grick leather?
If so, how do you calculate how complicated that process would be, and what it would cost in time and resources?
Best Answer
Making armor from animal/monster parts has a long history in D&D and other fantasy games but I don't think I've seen specific rules for it in 5e. But since the armor you are talking about has special properties that would push into the "magic item" category the DMG does have rules on pages 128 and 129. It is a bit too long for quoting here but you should review it.
There is no "Grick Hide Armor" listed in the DMG so you will first need to define what the finished item will be, in particular the level/rarity of the item because that will determine the difficulty, cost and time to create the item.
Some important things to consider: