Symbols Alchemised SenLinYu

Obsidian in Alchemised: A Stone of Death, Power, and Moral Weight

What Is Obsidian?

In SenLinYu’s Alchemised, obsidian is a volcanic glass that, when alchemically treated, can absorb and store death energy. It appears as a sharp, brittle material—its edges are sharper than razors but it shatters easily when wielded improperly. The stone’s unique property makes it lethal to necrothralls and even to liches, the most powerful undead servants of the High Necromancer Morrough. Obsidian becomes a turning point in the war between the Resistance and the Undying, and a deeply personal symbol for the protagonist, Helena Marino.

Origins and Discovery

Helena first experiments with capturing death energy in Maius 1787, during the brutal aftermath of the first nullium bomb attack. While working in the Resistance hospital, she tends to dying soldiers and notices that at the moment of death, a surge of energy leaves the body. Using her vivimancy, she finds that obsidian can hold that energy (Chapter 56). This discovery is born from desperation: the Resistance is losing ground, and Helena is searching for any weapon that can counter the Undying’s necromantic power.

Later, in the weeks following a devastating bombing, Helena recalls that a piece of obsidian may have severed a necrothrall during the chaos (Chapter 60). This memory drives her to test the stone systematically, and she soon confirms its effectiveness.

Obsidian as a Weapon

The stone’s military application emerges quickly. A weapons specialist, supplied by Crowther, gives an obsidian spear to a young soldier. The soldier kills a lich with a single blow through the chest, and all the necrothralls bound to that lich collapse instantly (Chapter 60). The Resistance is electrified by the news; the Undying are recalled from combat, and Morrough’s forces are thrown into disarray.

Helena herself uses obsidian in increasingly large-scale ways. She helps build an obsidian bomb—a weapon designed to destroy entire enemy strongholds (Chapter 62). Later, when forced to flee Paladia, she leaves an obsidian knife for Kaine Ferron, the Undying spy she has come to love, as a final, ambiguous gift (Chapter 64). The knife is both a token of her trust and a reminder that she now possesses the means to end him.

Shifting Meanings

At first, obsidian represents hope and liberation—a way to fight back against an immortal foe. But its meaning darkens as Helena grasps the full implications. She has created a weapon that can kill any lich, including Kaine, the man she has healed and grown to love. Her initial triumph curdles into dread:

“She had not saved him; she had created a new way to lose him instead.”

The obsidian weapon transforms from a tool of survival into a symbol of Helena’s moral compromise. To win the war, she must make herself complicit in the very death magic she has long opposed. Each use of obsidian deepens her guilt and alienation, echoing the themes of power and corruption that run through the novel.

Character Connections

Helena Marino is the creator and moral centre of the obsidian weapon. Her vivimancy allows her to manipulate death energy, but every experiment takes a toll on her psyche and her body. She is both the healer who saves lives and the engineer who designs tools for mass killing.

Kaine Ferron is the character most personally affected by obsidian. As an Undying bound to Morrough by a phylactery, he is technically a lich, and therefore vulnerable to obsidian weapons. Helena’s discovery means she can kill him—a power she never wanted. Their relationship, built on trust and mutual rescue, is now shadowed by the possibility of Helena being the one to end his life.

The Resistance as a whole embraces obsidian eagerly, but its leaders also use it to tighten their control. Crowther leverages the weapon’s success to secure his place on the Council, demonstrating how innovation can be twisted into a tool for political manipulation—one of the many manipulation and control dynamics in the book.

Thematic Connections

Obsidian links directly to several major themes:

Power and corruption: Helena’s ability to harness death energy grants her immense power, but it also leads her to betray her own ethics. She builds a bomb, accepts the role of a carrion bird in palliative care, and makes deals with Crowther that compromise her soul.
Love and sacrifice: The obsidian knife Helena leaves for Kaine is a gesture of both love and self-sacrifice. She offers him the means to defend himself, even if that means he might use it against her allies—or against himself.
Survival and endurance: The weapon is born from the Resistance’s desperate need to survive. Without it, the war would likely be lost. Yet survival comes at a price: Helena must become a killer in spirit, if not always in deed.
Memory and identity: Helena’s experiments with obsidian are part of a larger struggle to remember who she is. By chapter 61, she feels she is “losing herself, crossing lines she never thought she would.” The stone becomes a physical marker of her transformation from healer to weapon-smith.

Study Questions and Answers

1. How does Helena’s discovery of obsidian’s properties reflect her role as a vivimancer?
Helena’s ability to perceive and handle death energy is a direct expression of her vivimancy. Unlike conventional alchemists, who work only with inert metals, Helena is attuned to the energy of dying bodies. Her discovery shows that her “defective” resonance, which the Faith condemns, can be turned into a powerful tool for the Resistance.

2. Why does Helena’s triumph turn to dread when she realizes obsidian can kill liches?
Helena’s dread stems from her bond with Kaine Ferron. She has spent months healing and protecting him, and the obsidian weapon makes him mortal. Her joy at having a weapon against the Undying is immediately undercut by the knowledge that it could destroy the person she loves. The novel states directly that she “had created a new way to lose him.”

3. How does the obsidian weapon challenge the Resistance’s moral boundaries?
The weapon is effective but brutal. Helena builds an obsidian bomb that kills indiscriminately, and the Resistance leaders use the discovery to tighten their grip on power. Crowther, in particular, exploits the weapon’s success to increase his own influence. The stone forces the Resistance to confront the question: how far are we willing to go to win?

4. In what ways does obsidian symbolize the cost of war for Helena?
Obsidian becomes a tangible representation of Helena’s lost innocence. She starts the war as a healer who saves lives, but by the end she is designing bombs and leaving knives for lovers. The stone is sharp, fragile, and stained with death—much like Helena herself. It embodies the toll that survival exacts on her body and conscience, a theme explored further in survival and endurance.