Call of Duty: Vanguard Zombies allows you to carry an Artifact that grants you a special power to help defend yourself when summoned. There are four superweapons, each of which is tied to one of the four friendly Dark Aether entities.

With the Season 1.5 update, the developers are introducing a new feature called Tome of Rituals. You can now improve the power and capabilities of your equipped Artifact by up to five levels. The Upgrades can be unlocked in exchange for Sacrificial Hearts, which you collect after each round.

Here’s a list of all the Artifact Upgrades in Vanguard Zombies:

  • Aether ShroudTier II – Automatically reload weapons.Tier III – Deal 500 percent bonus melee damage.Tier IV – Gain 50 percent move speed. Duration extended from five to eight seconds.Tier V – Number of charges increases from one to two.Ring of Fire (powers effective inside the ring)Tier II – Normal enemies take damage equal to two percent of their max HP every second.Tier III – Players use ammo from stock.Tier IV – Staying within the ring for up to 10 seconds increases the duration from 15 to 20 seconds.Tier V – Staying within the ring for up to 10 seconds increases your damage bonus from 50 to 75 percent.

  • Frost BlastTier II – Freezes normal and special enemies for three seconds once inside the zone for 0.5 second.Tier III – 100 percent increase in the Frost Blast radius.Tier IV – Increases the number of charges from one to three.Tier V – Frozen normal enemies can be “insta-killed”.Energy MineTier II – Stuns normal and special enemies for three seconds.Tier III – Explodes three times in a row after 0.75 second intervals.Tier IV – Increases the number of charges from one to three.Tier V – 66 percent increase in the explosion radius.

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  • Tier II – Normal enemies take damage equal to two percent of their max HP every second.Tier III – Players use ammo from stock.Tier IV – Staying within the ring for up to 10 seconds increases the duration from 15 to 20 seconds.Tier V – Staying within the ring for up to 10 seconds increases your damage bonus from 50 to 75 percent.