Repurpose Calm 4

For starters, Calm 4 is... not too fitting for Minecraft. Minecraft is a calm (ha-ha) game, and despite its name, this song is definitely not calm. But while not fitting with the creative and peaceful aspects of Minecraft, that's not all of Minecraft. I suggest that Calm 4 should be remixed & recycled for the more intense situations in Minecraft. Specifically, the battle with the Wither.

For the remix, it should go with the vibe of the End's music, sounding a small bit corrupted and ethereal. Also, MMoojjaanngg SSppeecciiffiiccaattiioonnss... it's be too weird to keep it in. But otherwise, keep the melody unchanged. Maybe add in a key change to make it more intense and appropriate for the moment in-game. Also, it should maybe be made quieter and fade in and out slowly at the start and end of the song to make it less jarring to hear.

For when the song would play, I think when there are at least 5 mobs around a player it would start playing to them. I also think when someone spawns the Wither it should play. A nice effect for the music specific to the Wither should be that it doesn't fade in, but instead abruptly starts when the Wither stops growing and explodes.