The True Crown is an item, which can be obtained by meeting Beg a second time while cursed. He will say "Ah, so you truly do love chaos. Like me!", and give you the True Crown.
Function
The True Crown will teleport you every 22 seconds. You cannot stop it, but you can influence the direction of your teleportation by looking in any direction (similar to the existing teleportation items). Every time you teleport, you get 22 bombs. It will anger Tun when you get near her.
Obtaining
To obtain the True Crown, you have to break an altar. At the next altar, you will find Beg, and NPC who will give you a bag of bombs and teleport away. Then, you must get cursed and reach the next altar while still cursed to have Beg spawn again, and drop the True Crown. Note that if you miss a single altar after breaking the first one, you can't get the True Crown.