The underground was quiet. Too quiet. Then, from the darkness of Waterfall, a new sound echoed:
You turn around. Standing on one webbed foot, wearing a tiny prep-school blazer and a bow tie, is a duck. Not a monster. A literal duck . quack prep undertale
It sounds like you’re looking for a based on the phrase “quack prep undertale” — likely a mashup or parody concept. The underground was quiet