Universal Tower Defense X Artifacts — Tier List, Drop Sources, and Best Build Combos

What artifacts actually do in UTDX

Artifacts in Universal Tower Defense X are per-unit equippable items. Every unit has one artifact slot. The artifact provides a single stat bonus — damage amplifier, range increase, attack-speed boost, gold-on-kill, or a hybrid effect that combines two stats at lower individual percentages. You equip the artifact through the unit detail screen before starting a run, and it persists between runs until you swap it.

The reason artifacts matter at Wave 50+: they stack on top of your trait rolls and the team-wide relic loadout. A First Emperor with a Mythic damage trait, an Ancient Sigil artifact, and a damage-amp relic active will hit roughly 30 to 45 percent higher effective DPS than the same unit without the artifact slot filled. That difference is the gap between clearing the Wave 75 boss in 14 seconds versus losing the lane.

One thing the in-game tooltip does not make obvious: artifact bonuses are multiplicative with trait bonuses, not additive. A 22 percent damage artifact on a 30 percent damage trait gives you roughly 58.6 percent total amplification (1.22 × 1.30 − 1), not 52 percent. This matters when you are comparing artifact options because the difference compounds at higher trait tiers.

Artifacts are also different from the relic system. Relics apply team-wide and one relic loadout covers every unit you place. Artifacts are personal to one unit only. You want both layers active on a serious Wave 100 push — relics for breadth, artifacts for the carry slot specifically.

UTDX artifact tier list — S, A, B, C

Tier list reflects 22 Wave 75 clears and 3 event runs in May 2026. Tier reflects how often the artifact stays equipped across multiple build configurations, not the raw stat number alone. Some artifacts have higher individual stats but a narrower role fit and end up B tier because they only work on one archetype.

How to obtain artifacts in UTDX

Three sources are active as of May 2026. Listed in order of reliability and farming efficiency for a player who can already clear Wave 75.

Practical farming loop after Wave 75 is on your account: run Void Court or Wind Valley with your standard hybrid build, clear to Wave 75, accept the drop, and reset the run if you do not need the Wave 100 push. The Wave 75 clear takes roughly 18 to 22 minutes once your build is dialed in. Two clears per session yields roughly four artifact drops, of which one in four is something you actually want.

The codes page on this site tracks event windows and active reward signals — check the active codes tracker before any session to see if there is a current event giving bonus artifact drops or featured event boss rotations.

Three best artifact combos by build

These are the three loadouts that survived 14 or more runs across May 2026 testing. Each one matches an archetype from the solo build guide, and the artifact distribution follows the same role-pairing logic as the unit slot distribution.

Artifact slot mistakes that cost me clears

Four mistakes from my first 10 artifact-equipped runs. None of these are theoretical — each one ended a real session.

Mistake 1 — Gilded Coin on First Emperor. I had a duplicate Gilded Coin and no other artifact for the slot, so I equipped it on First Emperor for a Wave 50 run. Gilded Coin's gold-on-kill bonus is tied to kill count, and First Emperor's role is single-target boss damage, not lane-clear. The bonus generated maybe one extra upgrade by Wave 30 — versus the Iron Pendant I had ignored, which would have added 10 percent damage to every shot. Match the artifact to the unit's actual role, not just "any artifact is better than no artifact."

Mistake 2 — Two Ancient Sigils stacked. When I drew a second Ancient Sigil I put it on Alpha Devil as my secondary carry. The Wave 75 clear rate did not improve — both carries already had healthy DPS, and the second damage amp delivered diminishing returns. Swapping the second Sigil for Crimson Lens on the splash unit was the correct call once I tested both configurations side by side. The lesson: artifact stat diversity beats artifact stat stacking past the second slot.

Mistake 3 — Forgetting to equip after a unit swap. After the Wave 28 farm pivot I swapped Bulmo out for Ice Empress, but I left Gilded Coin in inventory and forgot to put Frozen Stone on Ice Empress for the run. The Wave 50 boss reached the firing zone with a base slow duration only, and the carry's window was just shy of finishing the kill. Run lost. Now I check the artifact loadout for every unit I am taking into the run, including post-pivot replacements, before pressing start.

Mistake 4 — Saving a Tier S artifact for "when I'm ready." I drew Ancient Sigil at Wave 75 in my third clear and held it in inventory for two more sessions because I wanted to build out a Mythic-trait First Emperor before "using up" the artifact. Artifacts do not consume on use — they stay equipped indefinitely. The two sessions where I ran without the Sigil equipped were two sessions where I underperformed for no reason. Equip artifacts as soon as you draw them.

May 2026 update notes

Three changes affected artifact balance in the May 2026 update window relative to the April patch.

First, Ancient Sigil's damage amp was reduced from 25 percent to 22 percent. This is still the strongest single-stat artifact for primary carries but the gap relative to Iron Pendant is narrower than it used to be. If you are sitting on a stockpile of Iron Pendants and have not drawn Ancient Sigil yet, the Iron Pendant is a more viable bridge artifact than it was in April.

Second, the Wave 75 boss drop pool added two artifacts (Crimson Lens and a tier B I have not personally drawn yet). This effectively dilutes the Ancient Sigil drop rate per clear, but adds more useful options to the pool — net positive for build diversity, slight negative for focused farming.

Third, the May 2026 event added Voidblade Charm as an event-exclusive A-tier artifact with a hybrid damage plus crit stat. Crit is not the dominant DPS modifier in UTDX (damage amp scales more linearly), but the combined stat puts Voidblade in a respectable A-tier slot for secondary carries during the event window. If you can clear the event boss reliably, prioritize Voidblade because the event will rotate out and you cannot re-farm later.

For a broader patch-aware overview see the May 2026 meta page on this site, which covers unit balance and squad meta context that affects artifact role-matching.

A note for players who searched for "UTDX script"

If you found this page while looking for a Universal Tower Defense X script — an executor-based tool to automate artifact farming or skip boss waves — read the ToS warning page first. Executor scripts violate Roblox's Terms of Service and can result in permanent account termination across your whole Roblox account, not just UTDX. The legitimate path to artifact progression is clearing Wave 75 reliably, which the build and reroll guides on this site cover in detail. That knowledge transfers across patches; an exploit account does not.