Big Un | Raid Shadow Legends

Raid Shadow Legends Big 'Un Skill Mastery Equip Guide


NAME: Big Un
FACTION: Ogryn Tribes
RARITY: Legendary
ROLE: Attack
USABILITY: Early-Mid-Late Game
TOMES: 12 (A2 A3)



Obtain from

Ancient Shard
Sacred Shard
Primal Shard

Blessings Recommendation

Brimstone (Debuffer)
Lightning Cage (Arena)
Soul Reap (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

Big ‘Un Skills

Head Splitter
Attacks 1 enemy. Attacks all enemies 1 time if the first attack is critical.
Level 2: Damage +5%
Level 3: Damage +5%
Level 4: Damage +5%
Level 5: Damage +15%
Damage Multiplier: 2.5 ATK

Forward Charge (Cooldown: 3 turns)
Attacks all enemies. Has a 30% chance of placing a [Stun] debuff for 1 turn. Also has a 50% chance of placing a 50% [Decrease ACC] debuff for 2 turns.
Level 2: Damage +10%
Level 3: Buff/Debuff Chance +5%
Level 4: Damage +15%
Level 5: Buff/Debuff Chance +15%
Damage Multiplier: 3.6 ATK

Molten Slag (Cooldown: 7 turns)
Attacks all enemies 2 times. Decreases the Turn Meter by 25%. Has a 30% chance of placing a 30% [Decrease SPD] debuff for 2 turns.
Level 2: Damage +10%
Level 3: Damage +15%
Level 4: Cooldown -1
Level 5: Cooldown -1
Damage Multiplier: 1.9 ATK

Increases Ally ACC in Dungeons by 90.

Big ‘Un Build Guide

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

Recommended Artifacts

PvE: Bloodthirst, Lifesteal
PvP: Zeal
PvE & PvP: Accuracy, Critical Damage, Cruel, Divine Speed, Fatal, Instinct, Killstroke, Lethal, Merciless, Perception, Savage, Speed, Stun, Supersonic

Stats Allocation

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

Stats Priority

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

Supporting Roles


Big ‘Un Masteries Guide

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

Raid Shadow Legends Big 'Un Skill Mastery Equip Guide


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


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

Big ‘Un Reference

Big ‘Un Damage Build

The artifacts equipped on Big ‘Un are optimised for Arena, Faction Wars and Doom Tower content. Savage Set is used to ignore enemy defense and utilizes Helmsmasher (Tier 6 Offense Mastery) to ignore up to 50% enemy defense. Big ‘Un can ignore 100% ignore defense when he is paired with a debuffer champion who has the ability to inflict 60% Decrease Defense debuff on the enemy before Big ‘Un strikes them down. This allows Big ‘Un to bypass enemies defense and quickly knocking them out of battle. Big ‘Un is equipped with an Accuracy Banner to provide him with decent amount of Accuracy, so that he could apply his Decrease Turn Meter, Stun and Decrease Speed debuff on enemies for PvE content (e.g. Campaign, Dungeon, Faction Wars).
Raid Shadow Legends Big 'Un Artifact and Stats Reference Guide for Damage Build

Big ‘Un Review

Big Un is a Legendary Attack Magic affinity champion from Ogryn Tribes faction in Raid Shadow Legends. Big ‘Un is one of the top damage nuking champions in the game! All of Big ‘Un attacks are AoE (Area of Effect), which makes him viable in many areas such as Nightmare Campaign speed farming and Arena Blender Teams. In addition, he can crowd control mobs in Dungeons, Faction Wars and Doom Tower with his Decrease Turn Meter and Stuns. Big ‘Un also can apply Decrease Accuracy debuff on enemies to lower their chances of applying debuff your champions too!

To unleash Big ‘Un’s full nuking potential, it’s best to equip him in Savage Set paired with Helmsmasher mastery and supported by a debuffer champion who has Decrease Defense and Weaken debuff skill! In addition, Big Un has an Accuracy Aura in All Battles, which is useful for early game players. The aura provides an ample amount of Accuracy stats to enable his team members to successfully apply debuff on enemies (e.g. Poison Debuff, Decrease Defense, Weaken, Stun, Decrease Turn Meter) as it will be difficult in early stages to farm decent Accuracy Banner from Spider’s Den or Accuracy chestplate from Dungeons!

Big ‘Un Videos

ASH: Big ‘Un Guide, Build & Comprehensive Review

ASH: Nuker Builds – CRIT DMG vs IGNORE DEF, which is better?

Raid Shadow Legends Big ‘Un Champion Guide by StewGaming

Raid Shadow Legends Big ‘Un Champion Guide by Farting Cows

Raid Shadow Legends Big ‘Un Champion Guide by JGigs

Raid Shadow Legends Big ‘Un Champion Guide by Pylyp (Russian)

Champion Name Reference

  • English: Big ‘Un
  • French: Gros Bill
  • Deutsch: Viech
  • Italian:
  • Spanish: Grandullón
  • Chinese:
  • Korean:
  • Japanese:
  • Ukranian:
  • Russian:
  • Turkish:
  • Portuguese:

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18 thoughts on “Big Un | Raid Shadow Legends

  1. Belinda Smith

    Do ya need the Destroy Set Gauntlets? I’m not able to obtain that set as of yet!

  2. travis hutton

    on big un i have him on immortal weapons,helmet,sheild,and gloves. then chestplate i should have it on critical damage plus boots but right now i don’t have the artifact for chestplate and boots for critical damage. however i am seeing big un doesn’t survive long using this set up.

  3. OSCAR


  4. Yolo

    Doesn’t Ash say Crit dmg gear and mastery is better in arena than Armor Pen?

  5. Ayumilove Post author

    @jack: Yes, you could run Big ‘Un in Stun Set if you are using him to crowd control enemies in Arena and Dungeon waves if your team is not able to knock out the enemies within the single turn with Big Un AoE attacks!

  6. Ayumilove Post author

    @MrBoop: Yes, Big ‘Un “Molten Slag” (A3 Skill) decreases the enemies turn meter for every hit if successfull. However, you need to have a decent amount of Accuracy for high level content such as Dungeon Stage 20~25 (approximately 225~250 Accuracy for dungeon content).

  7. MrBoop

    Does each hit in his A3 decrease turn meter/has a chance to place the debuff?

  8. jack

    could you not run a stun set with high accuracy, crit rate, damage and speed for nuke arena and dungeon waves?

  9. Bacon knight

    Got 3 Big ‘Un mmaayybee 6 star the last 2 for some fun to use with an ally attack or ca combo!!

  10. Ayumilove Post author

    @Karamnik: You can use Swift Parry Set on Big’Un to avoid getting 1 hit KO by enemies in Arena.

  11. Ayumilove Post author

    @DoctorWhoLaLa: Big’Un can greatly benefit from Retribution, where he counter-attacks the enemy when they hit him hard. This is especially useful in Arena too! Defense Mastery provide him some survivability because Big Un is pretty squishy if you build him with full attack stats.

  12. Karamnik

    Hi, what about a swift parry set for this champ?

  13. luckmonkey

    Bigun is 5 star for all dungeons simply because of how well he handles the waves. Plus has a little TM reduc on several bosses

  14. DoctorWhoLaLa

    Hi! I appreciate you making this guide, has been a big help! Was wondering why you would choose to have defense masteries for Big Un rather than support? Thank you 🙂

  15. Aeolwind


    Yes, he has 2 multi-hit skills and he has turn meter manipulation along with slow speed. He is good on the waves leading in, even if he has negative affinity on FK20.

  16. GoTo

    Big un is 5* for FK?

  17. Sven

    How come not the support tree? to increase his ACC