Gem Farming + Trait Rerolls
Gems are the lifeblood of progression in Universal Tower Defense X. They fuel your summons, trait rerolls, and event access. This guide lays out every reliable gem farming method and when to use each one.
8 min readIntermediateUpdated 2026-04-29
Quick Tip: Legend difficulty stages give significantly more gems per clear than Normal — push to unlock them as early as possible.
Table of Contents
Gem Sources Ranked by Efficiency
- Daily Missions — consistent 100-200 gems per day, always complete these first.
- Event Participation — Update 2.5 Cursed Energy event awards bonus gems for completing event stages.
- Legend Story Stages — highest repeatable gem yield per run, especially with a fast-clear team.
- Community Codes — new codes drop with each update and milestone, check the codes page weekly.
- Achievement Milestones — one-time gem rewards for reaching player level thresholds and collection goals.
When to Spend Gems
- Prioritize multi-summons during rate-up banners for new units.
- Save at least 500 gems for trait rerolls on your Boundless or Secret rarity carries.
- Avoid single summons — the multi-summon bonus makes a significant difference over time.