The idea is not new - I showed it in my New Years video, but as I get many requests to show it I thought I'd do just that. I didn't explain how it works, but I think you know. Taking advantage of being immune after being damaged by using a ton of explosives.
There are ways to do this much faster, but I couldn't duplicate that in my small bombroom. Either way, 1 down 3 to go ;)
Songs:
Loudly -"Supernova"
Butterfly tea - "Cavern of Time"
Yrimir currently has 156,078,647 views spread across 302 videos for Terraria. There's over 1 day worth of watchable video for Terraria published on his channel, roughly 97.79% of the content that Yrimir has uploaded to YouTube.