Berserker Helm, Can't find Abyss Horn Shard

[seen_chan]

So Finally get the Myst acc. blueprint. but I can't seem to find the Abyss Horn Shard material.
not mentioned in Bestiary as well.
no result searching in google.

[The nameless Gamer]

Try the eBook guide option in the game's main menu.

[seen_chan]

yeah I did. can't seem to find it.

[The nameless Gamer]

Probably in the post-game content, in the areas you can access AFTER beating the final boss.

[Schiuma_Dabarba]

To get the abyss horn shard you have to use the "torrent" spell you obtain in the fire prison biome to complete the firefighter trial chamber (C-37 on the eBook map). Just spam it top right and left of the chamber to estinguish the flames and get the gold trophy.

WHAT I'M MORE CONFUSED ABOUT IS HOW DO YOU BEAT STAGE 0 KIROS FOR THE LAST 5 FORBIDDEN METALS I LITERALLY CAN'T COMPREHEND

[seen_chan]

oh I will try that later.

Well.
I use cheat engine to beat Kiros.
that is waaaay waaay tooo hard for me. XD

[seen_chan]

Ok confirmed.

Got it finally.
For anyone who is curious about the effect & stats.
see spoiler below.

it is Bloody Berserker LV3.
Reduce hp 10%/sec, but increase crit rate by 100%
STR +152
INT +152
ARP +50%
MRP +50%
CDM +50%
MP +300