Idle Online Universe Wiki

Artifacts are only available to unlock in monthly Events and provide various bonuses. They were first introduced in patch v0.99.55. Artifacts are leveled up with Artifact XP, which is also gained from events (granted retroactively to all participants). Some base experience is also granted for each artifact. Hover over an artifact's image to see the date you earned it.

Artifact XP distribution can be reset once every seven days. Artifact XP is increased by 2.5% for each Lineage Level, and can also be increased with the Expeditions Lab upgrade Deciphering Texts and the Legendary Upgrade Artifact Study.

Prior to patch v1.0.0, during the Match 3 Event in August 2019, the Artifact Tier system was released. Artifacts start at tier 1.0 and tier increases by 1 if you complete its event again. Each artifact's bonus is multiplied by its tier.

In the Shop, you can buy unowned artifacts and upgrade their tier by 0.1 up to twice. The rate at which tiers are earned can be upgraded with the VIP Upgrade Event Tiering.


Image Name Effect (Base) Increase Per Level Event/Release and Requirement
Frowns Mask +4% Card Yield +0.25% Halloween Event 2018

25 Blue Candies and level 500

Santa Globe +4% Gold Yield +0.25% Taking Down Santa Event 2018
Gold Dragon +4% Gold Logs +0.25% New Year Event 2019

Spend 4000 Invest Points

Fish Tastiness +4% Fish Quality +0.25% Global Warming Event 2019

Reach tier 20

Clean Energy +4% Fish Min Quality
Also increases the doubling chance by a small amount
+0.25% Clean Energy Event 2019

Complete first playthrough

Match3 NRG +4 Fish/Wood/Mine NRG each day (rounded down) +0.25 Match 3 Event 2019

Complete the event

Mafia Madhat +2% Pet Training +0.125% Mafia Madness Event 2020

Defeat the final boss

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Upgrade Cost[]

The base upgrade cost is 500. The cost of each level increases by this amount. Every ten levels, ten times the increment is added to the cost and the increment increases by 500. The formula for upgrade cost is 500*level*ceiling(level/10).