Thylessia | Raid Shadow Legends

Raid Shadow Legends Thylessia Skill Mastery Equip Guide


NAME: Thylessia
FACTION: Knights Revenant
ROLE: Attack
USABILITY: Early-Mid Game
TOMES: 13 (A3)



Obtain from

Ancient Shard
Sacred Shard
Primal Shard
Sigmund the Highshield Fusion

Blessings Recommendation

Cruelty (Debuffer)
Phantom Touch (Damage Dealer)


★★★★✰ Campaign
★★★★✰ Arena Defense
★★★★✰ Arena Offense
★★✰✰✰ Clan Boss
★★★✰✰ Hydra
★★★★✰ Faction Wars


★★★★✰ Minotaur
★★★★✰ Spider
★★✰✰✰ Fire Knight
★★★★✰ Dragon
★★★★✰ Ice Golem
★★✰✰✰ Iron Twins
★✰✰✰✰ Sand Devil
★★✰✰✰ Phantom Shogun


★★★★✰ Arcane Keep
★★★★✰ Void Keep
★★★★✰ Force Keep
★★★✰✰ Spirit Keep
★★★★✰ Magic Keep

Doom Tower

★★★★★ Floors
★★★★✰ Magma Dragon
★✰✰✰✰ Nether Spider
★★★✰✰ Frost Spider
★✰✰✰✰ Scarab King
★★★✰✰ Celestial Griffin
★★✰✰✰ Eternal Dragon
★★✰✰✰ Dreadhorn
★★★✰✰ Dark Fae

Thylessia Review

Thylessia is an Epic Attack Force champion from Knights Revenant faction in Raid Shadow Legends. Thylessia was introduced in Patch 4.60.2 as one of the four champions required to fuse Sigmund the Highshield Champion Fusion Event on October 2021! To obtain Thylessia, you will need to collect fragments of her through tournaments and events while Sigmund the Highshield Fusion is active!

Weft of Madness (A1 Skill) is Thylessia’s default attack that has a unique ability to spread debuff on hexed enemies. This synergizes well with single-target debuffer champions such as Drexthar Bloodtwin, which allows you to spread HP Burn debuff on all spiderlings in Spider’s Den to quickly dwindle the Spider boss HP!

Melancholia (A3 Skill) enables Thylessia to inflict Decrease Defense debuff on all enemies to allow her allies to deal more damage on them! Shrieking Voices (A2 Skill) is another useful skill that increases debuff duration, so enemies will be under debuff for a longer period to reduce their battle effectiveness.

Last but not least, Thylessia has a passive skill Feast of Woe that allows her to place Hex debuff on enemies whenever she attacks an enemy under Decrease Defense debuff. However, her success rate is kinda low, which does not make her a reliable champion to spread debuff to all enemies in battle consistently by herself. Hence, it’s recommended to pair her with a champion who can 100% apply AoE Hex debuff such Ruel the Huntmaster.

Thylessia Skills

Weft of Madness
Attacks 1 enemy. Has a 50% chance of applying a [Debuff Spread] effect, taking 1 random debuff from the target and placing it on all enemies under [Hex] debuffs.
Level 2: Damage +5%
Level 3: Buff/Debuff Chance +5%
Level 4: Damage +5%
Level 5: Buff/Debuff Chance +5%
Level 6: Damage +10%
Level 7: Buff/Debuff Chance +10%
Damage Multiplier: 3.5 ATK

Shrieking Voices (Cooldown: 3 turns)
Attacks all enemies. Increases the duration of all debuffs on all enemies by 1 turn.
Level 2: Damage +5%
Level 3: Damage +5%
Level 4: Damage +10%
Damage Multiplier: 3.7 ATK

Melancholia (Cooldown: 4 turns)
Attacks all enemies. Places a 60% [Decrease DEF] debuff for 2 turns.
Level 2: Damage +5%
Level 3: Damage +5%
Level 4: Damage +5%
Level 5: Cooldown -1
Damage Multiplier: 3.7 ATK

Feast of Woe (Passive)
When attacking enemies under [Decrease DEF] debuffs, has a 50% chance of placing a [Hex] debuff on them for 2 turns.

Thylessia Build Guide

Arena, Campaign, Clan Boss, Dungeons, Doom Tower, Faction Wars

Recommended Artifacts

Lifesteal, Bloodthirst, Accuracy, Perception, Speed, Stun

Stats Allocation

Weapon (ATK)
Helmet (HP)
Shield (DEF)
Gauntlets (C.RATE / C.DMG)
Chestplate (ATK%)
Boots (SPD)
Ring (ATK)
Amulet (C.DMG)
Banner (ACC / ATK)

Stats Priority

Damage Dealer & Debuffer: ATK%, C.RATE, C.DMG, SPD, ACC

Thylessia Mastery Guide

Arena, Campaign, Clan Boss, Dungeons, Doom Tower, Faction Wars

Here is Thylessia masteries optimized as an all-rounder build for all areas in the game without requiring any specific speed-tuning for a particular team composition.
Raid Shadow Legends Thylessia PvE Mastery Guide


  1. Deadly Precision
  2. Keen Strike
  3. Heart of Glory
  4. Whirlwind of Death
  5. Single Out
  6. Bring it Down
  7. Cycle of Violence
  8. Kill Streak
  9. Methodical
  10. Warmaster


  1. Pinpoint Accuracy
  2. Charged Focus
  3. Swarm Smiter
  4. Evil Eye
  5. Sniper

Thylessia Reference

Thylessia Damage Dealer Build

Here is Thylessia artifacts and masteries by Skratch built as a damage dealer and debuffer for Arena, Dungeons, Doom Tower and Faction Wars. Thylessia is equipped in mix artifacts of Cruel, Speed and Immortal Set to gain additional Attack, Speed and HP stats. The stats to prioritize on Thylessia are Attack, Critical Rate, Critical Damage, Speed and decent amount of Accuracy for her to inflict Hex debuff and Decrease Defense debuff. You will only need 225 Accuracy to be able to apply debuff on enemies located in Dungeons, Faction Wars and Doom Tower Normal difficulty.
Raid Shadow Legends Thylessia Artifact and Stats Reference Guide as a Damage Dealer

Thylessia Updates

Thylessia Videos

ASH: Thylessia – Why Nobody Should Sleep on Her!

StewGaming: Thylessia A Read Guide – Unstoppable power

Skratch: Thylessia Champion Spotlight (Timeline: 18:55)

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16 thoughts on “Thylessia | Raid Shadow Legends

  1. Kurtis Fox

    No Hydra rating here and she isn’t even listed on the Hydra page. ?

  2. Jabrit

    @Kewlcrayon I’m on the same sort of thought pattern about her but even eschew the Def Down because I’ll have someone else for it. I’m thinking of her in Reflex or Relentless with high defensive stats, speed and accuracy where I have her def down turned off completely. Her only real purpose will be to apply hex, spread debuffs, and extend their duration in an AoE focused setting.

    I’m thinking Reflex over Relentless to prevent her from dropping buffs that’ll be important to keep her alive unless I get a really good Relentless set.

    When that new +10% Def -15% damage taken from AoE 2 piece set comes out that’ll for sure be the second set bonus she has after Relentless/Reflex.

  3. Kewlcrayon

    You got her speccd for a damage dealer when her real use is for the def down and increase debuff.

    Lots of speed and accuracy needed here. Theres better damage dealers out there

  4. BrainBird

    I’m not seeing the increase debuff work on provoke or stun. Is this accurate or am I missing something? It says “all debuffs”, but I use Visix and Big ‘Un a lot and was thinking that Thylessia might create some fun CC synergy. That was not exactly what I experienced. Any insights?

  5. Dinky Hocker

    @Fel – Yes.

  6. Fel

    Should I 60 her instead of Warmaiden as a drop def champion?

  7. Leo

    I’ve been using her for Dragon as well. Helped speed up my runs. Haven’t tried her much outside of that but will do so soon. I don’t regret lvling her (though I haven’t fully booked her).

  8. daniel

    She is 5 star for dragon
    if you run her with frozen banshee.she will increase the posions on the boss.insane A2

  9. Jerbearnicorn

    I’d give her 4* on Clan Boss. She does a great job of improving team poison damage with her extend debuffs and decrease defense helps everyone hit just a little harder, if you don’t already have it. I’m at the account level of doing about 27-29mil per key on UNM with budget unkillable. My Force team was lagging behind at around 23mil, just being below 3-key. She brought my Force damage up to even with my other affinities.

  10. Thomas Chapman Wing

    @Mortar Mike: Stun set, you say? I hope you’re being serious here, because I just might try it. I’ve been looking for someone to speed up those KR crypt runs for a long time, and just 6-starred her yesterday without any playtesting (those champ training events/tournaments force my hand sometimes). Wasn’t sure quite what to do with her, but I wonder if she’ll make Thea viable. Would be nice to Auto KR 21 some day, during CvC, for the extra points.

  11. Mortar Mike

    Honestly, this is one of the best epics that they’ve added to the game in a while. The ability to crank out Hex debuffs rapidly, spread debuffs, increase debuff durations, AND AOE Def Down in one champ? Put her in a stun set and she can almost lock down waves herself, and paves the way for other Champs to do their jobs. Awesome champ.

  12. Fleafii

    Her a3 applies def down and the hex at the same time. (1 turn)
    Only 50% chance for the hex though

  13. Ayumilove Post author

    @Jason: I have included Thylessia artifact and mastery recommendations to this page!

  14. sin

    her skills are a bit wonky. her passive should be 100%. cause you can get the hex out after two turn (if you don’t have anyone elso to put dec. def. before her), and it becomes useable at the 3rd turn. by that time most fights are over.
    I think putting her in stun gear would be best. relentless just doesn’t feel right.

  15. Jason

    Why dont you have any gear recommendations for Thylessia, or masteries? I assume HP% would be best for chestplate or ATK% better?

  16. Felix Javier

    If her health was 3K higher, she would be a beast.