Thylessia | Raid Shadow Legends

Raid Shadow Thylessia Skill Mastery Equip Guide

Raid Shadow Thylessia Champion Avatar

Obtain from

Ancient Shard
Sacred Shard

Champion Fusion

Sigmund the Highshield


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

Total Stats (6★)

Health Points (HP): 12,720
Attack (ATK): 1,454
Defense (DEF): 1,002
Speed (SPD): 97
Critical Rate (C.RATE): 15%
Critical Damage (C.DMG): 60%
Debuff Resistance (RESIST): 30
Debuff Accuracy (ACC): 0


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


★★★★✰ Minotaur
★★★★✰ Spider
★★✰✰✰ Fire Knight
★★★★✰ Dragon
★★★★✰ Ice Golem


★★★★✰ 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!

Weft of Madness (A1 Skill) is Thylessia 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 down 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 of time 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, the 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 [ATK]
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 Equipment 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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9 thoughts on “Thylessia | Raid Shadow Legends

  1. daniel

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

  2. 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.

  3. 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.

  4. 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.

  5. Fleafii

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

  6. Ayumilove Post author

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

  7. 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.

  8. Jason

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

  9. Felix Javier

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