So what are synergies in ESO? Whether you PvE or PvP, you've probably noticed that pop-up on the bottom middle of your screen every time you're near a certain skill that someone else has casted in the group or in some cases a couple of things that may have come from yourself!

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Generally speaking, you cannot synergize off of the skills you cast but you can synergize off of the skills of other players should they provide synergies. The only three exceptions to this rule of thumb are the item set Haven of Ursus, the monster set Lady Thorn and the Necromancer skill Avid Boneyard.

Synergies that deal damage once a person synergizes them do NOT add to the original casters' damage but the damage of the person who synergized. In fact, the tooltip numbers you see on the damage in regards to certain synergies like Combustion are not what someone else will be getting!

Regardless of what synergy it is, each synergy has a 20 second cooldown so even if a skill that provides a synergy comes back up immediately after, you need to wait 20 seconds until you can activate that specific synergy again.

However you can still activate different synergies that are not yet on that 20 second cooldown. Keep in mind that even if you have different morphs of the same base skill active during a fight and they offer synergies, they still share the SAME cooldown.

Note that some synergies that appear during certain PvE instances or boss fights are NOT combat synergies they are usually mechanic synergies such as using the levitation pads in Cloudrest's shadow realm, dropping Hoarfrosts in Cloudrest and beaming adds during Lunar Phase in Maw of Lorkhaj.

Here is the list of all the synergies available ingame as of Stonethorn DLC/Update 27 and how many people can synergize each skill along with other detailed information regarding the synergies:

Dragonknight Class Skills

  • Standard (Both Morphs) gives 1 synergy to 1 person in its vicinity.
  • Talons (Both Morphs) gives 1 synergy (provided non-flying/non-immune targets are actually immobilized) to 1 person nearest to them.

Sorcerer Class Skills

Nightblade Class Skills

  • Consuming Darkness (Both Morphs) gives 2 synergies to 2 different individuals per cast.
  • Soul Shred (Both Morphs) gives 2 synergies to 2 different individuals per cast.

Templar Class Skills

  • Spear Shard (Both Morphs) gives 1 synergy to 1 person per cast (shares cooldown with Orbs post-Morrowind patch).
  • Nova (Both Morphs) gives 1 synergy to 1 person nearest to the center per cast.
  • Cleansing Ritual (Both Morphs) gives 1 synergy to up to 6 different individuals per cast.

Warden Class Skills

  • Healing Seed (Botch Morphs) gives 1 synergy to 1 person per cast in its area.
  • Frozen Retreat (morph of base skill Frozen Gate) gives 1 synergy to 1 person per portal.

Necromancer Class Skills

  • Boneyard (Both Morphs; Avid Boneyard can be self-synergized by its original caster) gives 1 synergy to 1 person per cast within its area.
  • Agony Totem (morph of base skill Bone Totem) gives 1 synergy to 1 person per cast within its area.

Arcanist Class Skills

  • Passage Between Worlds (morph of base skill Apocryphal Gate) Passage Synergy given to an uncapped number of non-enemy players standing in either portal.

Universal Skills

  • Blood Altar (Both Morphs) gives 1 synergy to up to 12 people per cast (the caster does not get the synergy of their Altar).
  • Trapping Webs (Both Morphs) gives 1 synergy to 1 person per cast; this synergy only appears to 3 people at a time at a certain distance away from the landing location.
  • Inner Fire (Both Morphs; Inner Rage guarantees the synergy) can give 1 synergy to 1 person per cast.
  • Bone Shield (Both Morphs) gives 1 synergy to 1 person per cast but the shields resulting from the skill being synergized shields a total of 6 people including the synergizer and the people who are shielded are put on cooldown for this synergy.
  • Necrotic Orb (Both Morphs) gives 1 synergy to up to an unlimited number of people per cast.
  • Howl of Despair (morph of Werewolf base skill Piercing Howl) gives 1 synergy to up to 12 people per cast.
  • Haven of Ursus (Item Set) gives 1 synergy to 1 person per proc, can be self-synergized by its wearer.
  • Lady Thorn (Item Set) gives 1 synergy to 1 person per proc, can be self-synergized by its wearer.
  • Gryphon's Reprisal (Item Set) gives 1 synergy to 1 person per proc, can be self-synergized by its wearer.
  • Kraglen's Howl (Item Set) gives 1 synergy to 3 people within 15 meters of the item set user.
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