One Hit KO

Background

One Hit KO (abbreviated to OHK or OHKO) refers to abilities or attacks designed to defeat a target with a single use instantly. These abilities typically bypass conventional durability or defenses, ensuring the opponent is incapacitated without requiring multiple strikes or prolonged engagement. To qualify, the attack must defeat the target in a single action, rather than through a sequence of steps or cumulative effects.

One Hit KO abilities often involve forms of Durability Negation or other mechanics that make them difficult to counter. However, simply dealing extremely high damage in an RPG that results in an instant defeat does not qualify as One Hit KO—such instances fall under Damage Boost.

These abilities may come with restrictions, such as only affecting specific types of targets or requiring particular conditions to activate. For example, Akame’s Murasame only works on living, organic beings with a heart.

Also Called

• Instant Kill
• Fatal Strike
• Lethal Blow

Possible Applications

• Instant Defeat: Rendering the target unable to continue fighting in a single strike.
• Durability Bypass: Ignoring conventional toughness or defensive abilities.
• Status-Based Defeat: Causing instant incapacitation through conditions such as paralysis, petrification, or erasure.

Potential Types

• Direct Lethality: The attack outright eliminates the target upon contact.
  • Abilities include: Death-inducing strikes, life force absorption, or soul destruction.
  • Example Users:

• Conditional Execution: The attack only works under specific conditions, such as targeting a particular weakness.
  • Abilities include: Attacks that work only on certain beings, such as requiring a heart or specific trait.
  • Example Users:

• Reality Enforcement: The user invokes an absolute rule that forces a defeat upon the opponent.
  • Abilities include: Conceptual attacks that define the target as "defeated" upon activation.
  • Example Users:

Possible Limitations

• May only work under specific conditions or on certain types of targets.
• Some abilities require a direct hit or contact to activate.
• Certain opponents may have immunity or countermeasures against instant defeat.
• May be restricted by energy consumption, cooldowns, or limited uses.