Zenless Builds
Precious Fossilized Core

Precious Fossilized Core

A
Stunv1.0
ATK
594
Impact
15%

Effect

Behemoth Hunter

When the target's HP is no lower than 50%, the equipper inflicts 10% more Daze to the target. When the target's HP is no lower than 75%, this bonus is further increased by 10%.

*Stats are shown at base level

Values at S1/S2/S3/S4/S5

Who Should Use Precious Fossilized Core

Ranks and notes come from each Agent's build guide on Zenless Builds.

Koleda Belobog
Koleda BelobogPick #1 of 5 · S5
A craftable engine that raises Daze against high-HP targets, enabling very fast early Stuns. Great in short fights like Shiyu Defense or low-score Deadly Assault runs, but its value drops as fights drag on.
Lycaon
LycaonPick #2 of 6 · S5
An accessible A-Rank option that adds a lot of Daze, strongest early in fights while enemies are at high HP, helping you hit Stun breakpoints sooner.
Anby
AnbyPick #3 of 5 · S5
A craftable engine and the most used one. It gives a big Daze bonus against high-HP targets, so it's especially strong in Deadly Assault, where it can even beat S-Rank engines.
Dialyn
DialynPick #4 of 4 · S5
Adds Daze directly while the target has high HP, useful for quick Stuns, but it offers no Energy, so Dialyn can easily run short of resources for EX Special Attacks.
Ju Fufu
Ju FufuPick #4 of 5 · S5
The best F2P (craftable) choice for most Stunners: lots of extra Daze against high-HP enemies, giving the highest Daze per second in Deadly Assault. Its low Base ATK makes the full CRIT DMG buff hard to reach.
Lighter
LighterPick #4 of 6 · S5
Excellent for any Stunner, especially in Deadly Assault thanks to big Daze bonuses against high-HP enemies, where it can even beat S-Rank W-Engines despite being craftable. Weaker in other content but still viable.
Nangong Yu
Nangong YuPick #4 of 6 · S5
A craftable W-Engine with some of the highest Daze output, but only while enemies are at high HP. It shines in lower-score runs and can fall off in high-score clears.
Qingyi
QingyiPick #4 of 6 · S5
A craftable W-Engine that greatly boosts Daze against high-HP enemies. It shines in Deadly Assault, often beating S-Rank options; weaker in other modes but still perfectly viable.
Trigger
TriggerPick #5 of 6 · S5
More situational because it depends on the enemy's remaining HP, but in Deadly Assault (bosses stay at high HP for long) it becomes one of her best Daze options. Steam Oven S5 is a 4-star alternative with higher Impact potential but harder upkeep, best kept for Shiyu Defense.
Pulchra
PulchraPick #5 of 5 · S5
A craftable option that's rarely bad: very high Daze bonuses while enemies have lots of HP, so it does well in Deadly Assault and some Shiyu Defense floors, though it fades once enemies are low.

Stats

Stats by level

LevelATKImpact
0406%
101026%
10+1387.8%
202017.8%
20+2369.6%
302999.6%
30+33511.4%
4039711.4%
40+43313.2%
5049613.2%
50+53215%
6059415%