This song starts at 17m 19s.
[ Song Information ]
Title│Spear of Justice
Arranged by│피아노박스 PianoBox
Difficulty│★★★★☆
Details│Fight with Undyne. NGAHHHH!!!!
[ Music Sheet Information ]
Cover 1P + Comment 1P + Music sheet 4P
Music sheet starts at page 3.
Note when you preview it.