Genshin Thoma build, skills, and ascension materials

Everything you need to know about Genshin Impact’s Thoma, from his best build, to his ascension materials, constellations, and much more

Genshin Thoma holding up a bag of chocolates

Our Genshin Thoma build features all the best weapons, artifacts, and more for our favourite house husbando. I also features his latest banner, ascension materials, skills, and , we’ll update this guide with information on the polearm-wielding pyro character as soon as we manage to get our hands on it.

If you’re curious about other characters, make sure you check out our Genshin Impact Hu Tao, Genshin Impact Diona, and Genshin Impact Sayu guides. We also have articles that outline exactly what you can expect from the upcoming Genshin Impact update and the next Genshin Impact banner.

Genshin Thoma build

What’s the best Genshin Thoma build?

Thoma is a pyro support character capable of shielding his team with his skill and burst, while also setting his enemies ablaze, shredding their defenses. He’s quite situational, but currently has the second strongest shield at max stacks, and offers great stagger resistance. He’s pretty cost-effective, requiring low investment and less resin to build than other characters.

However, he has extremely high energy recharge requirements, his damage and skills don’t scale well, and he’s a pretty niche option for most teams, meaning he can usually be replaced by a stronger unit.

Don’t sleep on Thoma, though. Especially in the current, dendro-heavy meta of Sumeru, he’s finding a firm place among many elemental reaction teams.

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Upcoming characters: find out more about the next Genshin Impact banner

When’s the next Genshin Thoma build?

You have a small chance of picking Thoma up on any banner, but his most recent featured banner sees him get a massive rate-up alongside Genshin’s Childe and Genshin’s Yae Miko.

What’s the best Genshin Thoma weapon?

Due to Thoma’s desperate need for energy recharge, we recommend equipping him with any weapons that boost that stat. Engulfing Lightning is a great choice for elemental interaction teams, due to it having both energy recharge and elemental mastery, but is more often better used on Genshin Impact’s Raiden or Genshin Impact’s Xiangling.

Alternatively, Favonius Lance is a great choice, helping you meet your energy recharge requirements, but you need a lot of crit rate to trigger its passive reliably. If you’ve got a spare Skyward Spine, this also works to boost his energy recharge, but offers little else.

Outside of the above, the Catch is the best free to play option, but, like Engulfing Lightning, is highly contested by other characters. A good alternative is Kitain Cross Spear, which falls behind in its general buffs, but is far more affordable for a niche character like Thoma.

Weapon Effect
Engulfing Lightning Increases attack by 28% of energy recharge over the base 100%. You can gain a maximum bonus of 80% attack. Gain 30% energy recharge for 12 seconds after using an elemental burst
Favonius Lance Crit hits have a 60% chance to generate a small amount of elemental particles, which will regenerate six energy for the character. Can only occur once every 12 seconds
Skyward Spine Increases crit rate by 8% and increases normal attack speed by 12%. Additionally, normal and charged attacks hits on opponents have a 50% chance to trigger a vacuum blade that deals 40% of attack as damage in a small AoE. This effect can occur no more than once every two seconds
The Catch Increases elemental burst damage by 16% and elemental burst critical rate by 6%
Kitain Cross Spear Increases elemental skill damage by 6%. After your elemental skill hits an opponent, your character loses three energy but regenerates three energy every two seconds for the next six seconds. This effect can occur once every ten seconds. Can be triggered even when the equipping character is not on the field

What are the best Genshin Thoma artifacts?

If you plan to use Thoma on a melt or vaporize team, a four piece set of instructor is a good choice, due to its high elemental mastery. However, it’s not without its caveats. Instructor costs him his shield strength, doesn’t offer energy recharge, and the crit rate he requires for Favonius Lance’s passive.

Alternatively, if no one else has a set of Noblesse Oblige on the team, then it’s a good option for Thoma. Just ensure that you only use this if Thoma has enough energy recharge to burst regularly.

A really strong set combines two Tenacity of the Milelith with two Emblem of Severed Fate, providing him with energy recharge and HP% for his shield, though it can cost quite a bit of resin to get this set with all the sub-stats you need.

Artifact set Effect
The Instructor Two equipped: elemental mastery +80
Four equipped: increases all party members’ elemental mastery upon triggering an elemental reaction by 120 for eight seconds
Noblesse Oblige Two equipped: elemental burst damage +20%
Four equipped: increases all party members’ attack by 20% for 12 seconds after using an elemental burst. This effect cannot stack
Emblem of Severed Fate Two equipped: energy recharge increases by 20%
Four equipped: elemental burst damage increases by 25% of Thoma’s energy recharge. A maximum of 75% bonus damage can be obtained in this way
Tenacity of the Millelith Two equipped: HP increases by 20%
Four equipped: when an elemental skill hits an enemy, the attack of nearby party members is increased by 20% and their shield strength is increased by 30% for three seconds. This can be triggered once every 0.5 seconds. It can still be triggered even when Thoma is not on the field

Stat recommendations

Your priority should be getting Thoma to at least 200-250% energy recharge above anything else.

Main stats: 

  • Sands: energy recharge
  • Goblet: HP%
  • Circlet: HP% or crit rate (crit rate is important here if you’re using Favonius Lance)

Sub stats:

  • Energy recharge
  • Crit rate (if using Favonius Lance)
  • HP%
  • HP

Genshin Impact's Thoma after casting a spell

What are Genshin Thoma’s skills?

Active skills:

Skill Effect
Swiftshatter Spear Perform up to four consecutive spear strikes
Swiftshatter Spear (charged) Consume stamina to lunge forward, dealing damage to enemies along the way
Swiftshatter Spear (plunging) Thoma plunges from mid-air to strike the ground, damaging enemies and dealing AoE damage
Blazing Blessing Thoma launches forward with his polearm and delivers a flying kick that deals AoE pyro damage, while also summoning a Blazing Barrier. When Thoma casts Blazing Blessing, his elemental skill applies pyro to himself.
Blazing Barrier: pyro damage is absorbed 250% more effectively. When a new Blazing Barrier is obtained, the remaining absorption of an existing barrier stacks, and the duration is refreshed
Crimson Ooyoroi Thoma spins his polearm, dealing AoE pyro damage and weaving himself into a Scorching Ooyoroi.
Scorching Ooyoroi: While Scorching Ooyoroi is in effect, the active character’s normal attacks trigger Fiery Collapse, this deals AoE pyro damage and summons a Blazing Barrier. Fiery Collapse can be triggered once every one second. Except for the amount of damage they can absorb, the Blazing Barriers created in this way are identical to those created by Blazing Blessing. If Thoma falls, the effects of Scorching Ooyoroi are cleared

Passive skills:

Skill Effect
Imbricated Armor When you obtain or refresh a Blazing Barrier, your shield strength will increase by 5% for six seconds. You can trigger this once every 0.35 seconds
Flaming Assault Damage dealt by Crimson Ooyoroi’s Fiery Collapse is increased by 2.2% of Thoma’s Max HP
Snap and Swing When you successfully fish in Inazuma, Thoma’s help grants a 20% chance of scoring a double catch

What are Genshin Thoma’s constellations?

You need to use one Stella Fortuna for each constellation you activate. You obtain these when you receive a duplicate Thoma from a wish.

Constellation Effect
A Comrade’s Duty When a character other than Thoma that’s protected by his Blazing Barrier is attacked, Thoma’s Blazing Blessing and Crimson Ooyoroi cooldown is decreased by three seconds. This can be triggered once every 20 seconds
A Subordinate’s Skills Crimson Ooyoroi’s duration is increased by three seconds
Fortified Resolve Increases the level of Blazing Blessing by three
Long-Term Planning After using Crimson Ooyoroi, 15 energy is restored to Thoma
Raging Wildfire Increases the level of Crimson Ooyoroi by three
Burning Heart When a Blazing Barrier is obtained or refreshed, the damage dealt by all party members’ normal, charged, and plunging attacks is increased by 15% for six seconds

Genshin Impact's Thoma performing a fiery attack

What are Genshin Thoma’s ascension materials?

Here’s everything you need in order to fully ascend Thoma.

Required level Mora Materials
20 20,000 One Agnidus Agate Sliver, three Treasure Hoarder Insignia, three Fluorescent Fungus
40 40,000 Three Agnidus Agate Fragment, 15 Treasure Hoarder Insignia, two Smoldering Pearl, Ten Fluorescent Fungus
50 60,000 Six Agnidus Agate Fragment, 12 Silver Raven Insignia, four Smoldering Pearl, 20 Fluorescent Fungus
60 80,000 Three Agnidus Agate Chunk, 18 Silver Raven Insignia, eight Smoldering Pearl, 30 Fluorescent Fungus
70 100,000 Six Agnidus Agate Chunk, 12 Golden Raven Insignia, 12 Smoldering Pearl, 45 Fluorescent Fungus
80 120,000 Six Agnidus Agate Gemstone, 24 Golden Raven Insignia, 20 Smoldering Pearl, 60 Fluorescent Fungus

If you want to learn which characters are best, feel free to check out our Genshin Impact tier list.