Zalgo is a form of text formatting associated with [[creepypasta]], [[demon|demons]], and [[eldritch abomination|eldritch abominations]].  It uses various tricks, particularly Unicode "combining diacritics":https://en.wikipedia.org/wiki/Combining_Diacritical_Marks and control characters that change the text flow direction. The result is text that appears corrupted, glitchy and partially overwritten by eldritch symbols.

Zalgo text originated in fan edits of the comic strip [[Garfield]], usually containing the phrase "He Comes!".

h1. External Links
https://zalgo.org: A text generator used to summon H̶̘̚̚I̵̲̱͗̓M̴͍͈͌
zalgo commentary