Undertale - 001 Once Upon a Time (Piano) - YouTube
Undertale - Waterfall explored: Piano puzzle solution and Temmie Village location | Eurogamer.net
Comprehensive Undertale Piano Puzzle Guide - Indie Game Culture
Undertale Piano With the Great Treasure - YouTube
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the piano puzzle for the legendary artifact (and dog residue) says you only need to play the first 8 notes. but the statue where you get the notes only shows the first