Luck Effect

Luck is a utility gear effect that rolls on armor in Minecraft Dungeons II. It grants a chance for drops to arrive as duplicate variations of items — extra versions of gear you may already own, which is exactly what collectors and perfectionists want when hunting ideal rolls.
The chance starts at 10% at tier I, rises to 15% at tier II and 20% at tier III, and peaks at 30% on the unique tier. Because it can roll on any of the 152 armor pieces, finding a Luck piece to anchor a farming set is easy.
It is the collection-completion counterpart to Looter Effect, which increases raw drop volume — Looter gives you more rolls, Luck makes those rolls land on items you want duplicates of. Prospector and Slinger of Bling complete the treasure-hunter trio for farming loadouts worn on easy, repeatable missions.
Threat-level rules apply as usual: tier I only below threat 3, tier III from threat 6, and tier III as common as tier II from threat 15. Common armor never rolls it; rare pieces carry one effect and special pieces two.