Lumi Master/Lumis

Thornbloom

Rating 90Grass / Light

Verdict

SituationalBuild it beside a Leech setter. Against a fresh enemy with no Leech it does little.

Sest.

Why this tier: Once the enemy is Leeched, Thornbloom's 110 ATK snowballs fast, with its ATK stage and Swift tied to that Leech, which is its S-tier case. A fresh or swapped-in enemy leaves it with nothing, so pair it with a Leech setter.

Thornbloom's skills

Fixed kit always on Thornbloom, can't be swapped

Trait · passiveBramble Bush

This Lumi's ATK stage and Swift stacks are locked to the current enemy's Leeched count — the more Leeched it is carrying, the higher both climb.

Swappable skills choose which one to equip

Leech SeedUsed in official line-ups

Throws seeds at the current enemy and applies 2 Leech.

GrassCost 4Power 20

Raid

Hits the current enemy. Always crits if this Lumi's attack speed is higher than the target's.

SteelCost 5Power 75

Charge Up

The next skill this Lumi uses (other than Charge Up) gains +40 power. Lost if it switches out.

NormalCost 4Power 0

Leaf Storm

Hurls leaves at the current enemy; every Leech stack it carries heals each Lumi on your side of the field for 5% of max HP.

GrassCost 7Power 120

Fortify

Raises this Lumi's ATK and DEF by 1 stage each.

NormalCost 3Power 0

Verdant Growth

Sets the field to Grassy Field, hits every enemy on the field and applies 1 Leech to each.

GrassCost 5Power 40

Skills marked "Used in official line-ups" are the ones the game's own in-client line-ups equip on Thornbloom. See those line-ups.

How to use Thornbloom

Thornbloom's ATK stage and Swift both equal the Leech on the current enemy, so every Leech Seed or Verdant Growth makes it faster and stronger at once. That is the reason to pick it: once Leech is up, 110 ATK makes it one of the hardest hitters in the game, and Leaf Storm heals your side 5% per stack while it swings.

Against a fresh enemy with no Leech it has no stages at all, so it opens slow. Flying and Ice hit it for double.

Recommended build

The game's own in-client line-ups run Thornbloom with Leech Seed equipped: 3 official setups below, plus the materials it levels, stars up and evolves with.

Trait (fixed)

Bramble Bush— Trait

Bramble Bush: This Lumi's ATK stage and Swift stacks are locked to the current enemy's Leeched count — the more Leeched it is carrying, the higher both climb.

Skill to equip

Leech SeedChosen in 3 of 3 official setups

Trainer skill

ShieldRun in 3 of 3 official setups

Shield: Applies a shield to your own Lumi on the field, making them immune to the enemy's next skill damage and debuff. Expires upon leaving.

Level up & ascension

Thornbloom KeepsakeLevels up and ascends this line

Universal KeepsakeSwaps in for any Keepsake

Star Up

Thornbloom StarcoreRaises this line's star level

Universal StarcoreSwaps in for a regular or variant Lumi's Starcore

Each star adds damage dealt and cuts damage taken: ★1 +5% / -5%, up to ★5 +25% / -25%.

The Trait and Signature Skill come with this Lumi and can't be changed, so they set what the rest of the build is for. The skill and trainer skill picked above are the game's own — read straight off its official in-client line-ups on the Official Line-ups page. The Keepsake, Starcore and evolution materials are this line's own real items, from the game's own tables. Star Up's damage/mitigation numbers are the game's own published curve.

Type matchup

Takes extra damage from

Flying×2

Ice×2

Takes reduced damage from

Water×0.5

Grass×0.5

Electric×0.5

Light×0.5

Psychic×0.5

Recomputed from the game's own type chart against this Lumi's type(s) — dual types multiply. See the full Type Chart for every match-up.

Attributes

MaxMin

	Min	Max
ATK	78	110
DEF	60	92
HP	60	92
Work	34	66
Attack Speed	Faster than most0.9s

Each column is the species' own Min–Max range at its reference level — the exact spread the in-game Aptitude tab shows (an individual catch rolls somewhere inside it). See the Stat Rankings to sort the whole roster by any of these. Attack Speed is the Skill tab's Attack Interval: the seconds between automatic basic attacks, fixed per species, so lower is faster. Every basic attack deals the same damage per second, so a quicker one lands more hits rather than more damage, which is what on-hit effects care about. Each Swift stack speeds it up by 10% and each Paralysis stack slows it by 10%.

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