GrammarKing

GrammarKing is an old Twitch face global showing a man in bright yellow-orange sunglasses. In Taiwan's Hearthstone scene, the face acquired a specific second life in 2016 when viewers thought it looked strikingly like streamer 鋼琴殺手, commonly called 鋼哥 or "Piano Killer." Chat began spamming GrammarKing around him, and by 2017 the emote had become established shorthand for 鋼哥 in Taiwanese Hearthstone communities.

The joke became tied to his deck-building reputation. 鋼哥 regularly climbed toward Legend with all nine Hearthstone classes and shared deck lists under names beginning with 鋼琴殺手. Other Hearthstone chats began joking that streamers looking for a deck to "reference" should copy his lists, with GrammarKing carrying the callback. The resemblance was the meme rather than proof that the man in the original Twitch photograph was 鋼哥.

Viewers type GrammarKing in Twitch chat for grammar or wording jokes, and in Taiwanese Hearthstone culture it became a 鋼琴殺手 callback for his streams, deck lists, and long-running jokes about copying his decks.