Underground - Terraria is a high quality rip of "Underground" from Terraria.
Joke[]
At 0:16, the advertised track is mashed up with "U Guessed It" by OG Maco, a Green de la Bean reference. The first "bitch you" is also really loud to fake-out the traditional earrape Bean rips.
From 0:16 onwards, the tree in the thumbnail is replaced with Bean.
The background from 0:16 onwards