This study aims to describe the use of expressive illocutionary speech acts found in the webtoon Dark Moon: The Blood Altar. A fantasy serialized story of the young romance genre. This research method uses qualitative methods with descriptive analysis. The data collection technique used is reading and recording, a form of expressive illocutionary speech acts in the conversations of Dark Moon characters: The Blood Altar, the atmosphere, and the events that occur. The results showed that there were 224 expressive illocutionary speech acts in episodes one to twenty on the Dark Moon webtoon: The Blood Altar, which includes, nineteen praise utterances, twenty-three thanksgiving utterances, fifty-four criticizing utterances, fifty-six complaining utterances, forty-eight blaming utterances, four congratulatory utterances, and a flattering utterance of twenty.