This world was online about 34 hours where we did an infinity of things and although in some moments we could not all be together simultaneously we had an incredible time, Over the course, invited friends also joined to take a look at our terraria world and spend some time playing, it seems that that many hours would have passed in a couple of minutes of how entertaining it was.
I saw this game at the time of the release (in 2011), but I still have not tried it so far. I played mostly Minecraft in that time. I thought that Terraria is a 2D copy of the Minecraft. Later I stopped playing Minecraft, and I watched YouTubers playing it.
I saw only a few videos about Terraria so far. Based on your description, this game is probably as much entertaining as the Minecraft. Maybe even more. By the way, this is the first time I see a boss (?) in Terraria. Good to see that both games still has an active community and players.
Good luck and have fun.
Difficult games are my favorites and terraria is one of them. Many people think that both games are a copy of each other but it is not true, the truth are completely different, the only thing that might seem in the theme of construction and creativity where you can do everything and the limit is the imagination.