Serum W is a Rare Arsenal featured in the RPG strategy game, Library of Ruina. This extremely powerful rare arsenal is considered one of the easiest, if not the easiest, rare arsenals to use in allusions.
The user charges up their arm for a second, then dashes forward, grabbing whoever gets in the way and entering them into a cutscene. A successful Serum W grab is a highly effective way to incapacitate an opponent. However, if you miss with Serum W, you will become vulnerable for a small period of time, and its cooldown will increase.
When facing an opponent wielding Serum W, it is crucial to observe their animations, as they perform a distinct animation upon equipping it. This visual cue can help players anticipate its use.

Baral: An Executioner of the Claw
Baral is a character who wears a black belted trench coat, a necktie by his collar, and a rusted metallic helmet and gauntlet. As an Executioner of the Claw, he possesses knowledge of most of the secrets held by "the Head." Consequently, he is able to accurately assess Roland's current combat capabilities before a fight. During these assessments, Baral appears intimidating and concise, even amidst the chaos of battle.
Baral, alongside Luda (a Beholder of the Eye) and Zena (an Arbiter of the Head), arrives as the final uninvited guests. Their primary objectives include relocating Nest L and the Library to the Outskirts, and the extermination of Angela due to her violation of the AI Ethics Amendments Code.
Baral in Combat
Baral appears in the post-finale boss battle as an indestructible boss, accompanied by Zena. He begins with 801 HP and 451 Stagger. Baral utilizes two Speed Dice ranging from 4 to 6, gaining an additional Speed Die on turn 5. He starts with 6 Light and also possesses a buff that negates the first attack used against him if it rolls over 30.
Winning a clash against him with a specific combat page still negates his die. However, On Hit effects of the librarian's Combat Page do not take effect, and the librarian's Combat Page deals no damage. There is no publicly available information regarding his Key Page, nor are any passives listed within his page.

The Library of Ruina Experience
The core gameplay loop of Library of Ruina involves players taking on the role of the director of the Library, welcoming guests, and engaging in battles. Librarians fight to protect the Library, and defeated guests are transformed into books, thereby expanding the Library's collection. High-quality books summon guests who harbor even greater secrets, encouraging players to uncover the truth about the City as they gather these books.
The narrative often begins with the phrase, "Keep perfectly still. Remember." This sets a tone of caution and strategic thinking required for the game's challenges.
Library of Ruina Launch Trailer
Key figures and concepts within the game's universe include:
- The Pianist
- Angelica
- Ayin
- Carmen
- ???
The Library of Ruina Wiki serves as an unofficial encyclopedia for the game, developed by the South Korean studio Project Moon. It actively maintains a vast collection of articles and files, continuously improving its formatting and expanding its coverage of the City's subjects and phenomena. Players are encouraged to contribute to this resource by creating new articles or enhancing existing ones.