Demon Slayer Mark

Item from Demon Slayer by Koyoharu Gotouge

A flame-shaped mark that awakens on elite slayers during life-or-death combat — it multiplies their power exponentially, spreads to other marked warriors nearby, and kills every bearer before age twenty-five.

Also known as: The Mark, Slayer Mark, Demon Slayer's Mark

What They Know

• Awakens when heart rate exceeds 200 bpm and body temperature surpasses 39°C — conditions typically met only in life-or-death combat
• Dramatically increases the bearer's strength, speed, reflexes, and perception beyond normal human limits
• Once one Mark awakens in a generation, it can 'spread' to nearby warriors who meet the activation conditions — a resonance effect
• All known bearers died before age 25 — the Mark burns through the body's lifespan as fuel for its power boost
• Yoriichi Tsugikuni was the sole exception, living to ~80 with the Mark — the reason for his immunity is unknown
• Kokushibo became a demon specifically to escape the Mark's death sentence while retaining its power benefits

Connections

• born_with — yoriichi
• awakened_by — tanjiro
• awakened_by — muichiro
• awakened_by — mitsuri

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