"Corruption (OST Mix) - Terraria" is a high quality rip of the OST mix of "Corruption" from Terraria.
Jokes[]
At 0:09, the melody changes to "My Happy Song" by Super Simple Songs. At 0:28, the track is mashed up with "My Happy Song".
The rip loops at 1:15, though with an additional sample of "My Happy Song" before the melodyswap.