The Sun is the fourteenth biome in PickCrafter. It can be unlocked in The End using Rocket Fuel and only if you have prestige 5 or higher.
After reaching this biome from prestige 5 onward, and after upgrading the Plasma Pickaxe, the player can Prestige.
While in the Sun Biome, the status effect Overheat will apply. While at +50 heat or higher the only block that spawns is Sunspot. The heat can be decreased by going to another biome or by applying the Cryo status effect.