The Elder Scrolls Online Update 51 introduces an interesting change for players who enjoy experimenting with pet-focused builds. Six gear sets now have their damage classified as pet damage, creating more opportunities to take advantage of bonuses that increase damage dealt by summoned creatures.

This adjustment could be especially useful for players exploring the Infinite Archive, where certain Visions can boost pet damage. Although the change does not necessarily make these sets top choices for competitive trial builds, it gives players more options to experiment with in casual PvE, dungeon runs, and alternative character setups. Here are the six sets affected by the change and what players should know about each one.

1. Coldharbour's Favorite

Coldharbour's Favorite is a craftable set that summons a creature named Honor when you heal yourself or a group member, or when you deal damage to an enemy. After a two-second delay, Honor performs an effect based on the trigger, either healing allies or dealing damage over time.

With Update 51, the set's damage is now classified as pet damage, making it worth testing in builds that benefit from pet damage bonuses. Since Coldharbour's Favorite is craftable, players also have flexibility when selecting their preferred armor weight. This makes it a convenient option for experimenting without relying on dungeon drops.

2. Mad Tinkerer

Mad Tinkerer summons a Verminous Fabricant when you deal damage to an enemy. The mechanical creature charges forward, damaging enemies in its path and launching up to six enemies into the air, stunning them for two seconds. The effect can trigger once every eight seconds.

Under Update 51, Mad Tinker's damage is now considered pet damage. This gives the set another potential use in builds designed around summoned creatures and pet damage bonuses. The set drops from Clockwork City content, so players who already have pieces in their collections can test it before deciding whether to farm a new setup.

3. Icy Conjurer

Icy Conjurer summons an Ice Wraith when you apply a minor debuff to an enemy. The creature charges toward its target and deals Frost Damage over ten seconds, providing an additional source of damage during combat.

Update 51 reclassifies the set's damage as pet damage, making Icy Conjurer another option for players exploring summon-based builds. The set comes from the Frostvault dungeon, giving dungeon runners a reason to revisit its loot pool. Whether it performs well in a particular build will depend on how its effect works alongside the player's other skills and equipment.

4. Scavenging Demise

Scavenging Demise summons a Scavenging Maw when you deal Critical Poison Damage to an enemy. After a two-second delay, the creature attacks its target, dealing Poison Damage and applying Minor Vulnerability for 15 seconds. This debuff increases the damage the target takes by 5%, while the set's five-piece effect can activate once every ten seconds.

With Update 51, the set's damage is now classified as pet damage. Scavenging Demise drops from the Depths of Malatar dungeon and offers another effect to investigate when building around summoned attackers. Its Minor Vulnerability effect may also be worth considering when evaluating the set's overall contribution, although players should test its performance in the content they intend to run.

5. Aegis Caller

Aegis Caller activates when you deal Critical Damage with a Martial melee attack. It summons a Lesser Aegis for 11 seconds. After 2.5 seconds, the creature begins spinning its blades, dealing Bleed Damage every second. The effect can activate once every 12 seconds.

The set's damage now counts as pet damage under Update 51, opening up another possibility for players testing different gear combinations. Aegis Caller drops from the Unhallowed Grave dungeon. While this change does not automatically make it a best-in-slot option, it gives players another set to consider when looking for additional damage sources that can benefit from pet-focused bonuses.

6. Cinders of Anthelmir

Cinders of Anthelmir summons a Cindermoth when you deal damage. The creature pursues its target for eight seconds, switching to another nearby enemy if its original target dies before it arrives. Once it reaches an enemy, it bursts after one second, dealing Flame Damage and applying the Burning status effect to nearby enemies. The five-piece effect can activate once every eight seconds.

Update 51 now classifies the set's damage as pet damage, completing the list of six affected gear sets. Cinders of Anthelmir drops from the Oathsworn Pit dungeon and may be worth testing alongside other equipment that supports pet damage. Players who enjoy exploring unconventional builds have another option to experiment with as they look for effective combinations.

The Update 51 change gives pet-focused builds more gear options by allowing damage from these six sets to count as pet damage. This could be particularly interesting in the Infinite Archive, where pet damage bonuses may help players explore new combinations and playstyles.

However, the revised classification alone does not guarantee that every set will outperform established gear choices. The value of each set will still depend on its activation conditions, damage output, cooldown, and compatibility with the rest of a build. For now, players who already own these sets can start testing them with pet-oriented skills and bonuses to see which combinations work best for their preferred content.