First Blood is a long-running gameplay callout associated with Dota matches, where it announces the first kill of the game. The phrase became widely recognized through multiplayer gaming culture and spread into highlight videos, montages and reaction edits. It stays popular because the meaning is instantly clear even outside the game: someone struck first. That makes the clip useful for esports content, streamer edits and joke videos where a small early moment needs the feel of a major competitive breakthrough.