Yellow Portal

Appearance
The Yellow Portal is a rare, mysterious object that appears after a boss is defeated. It rarely occurs and takes a long time to find just one. The Yellow Portal is bright yellow on the edge but gets darker the closer to the center until it is black.

Behavior
Once a boss is killed a little yellow glow will appear and it will grow into the normal sized Yellow Portal which takes about a second. The Yellow Portal spins and it emits a yellow glow and yellow particles from the edge of it once it is fully formed. Once you go through it, your screen goes blank for about a second and you are teleported to the grid. The difference is that the grid is faint yellow, and there is a subtle yellow outline on the screen. Also, every room has three random items, like notes, abilities, hearts, or musical notes. The rooms smaller and rectangular, and have three exits all on one side. In the room you can pick any of them, unless you don't want it. The Yellow Portal will give you at least two rooms, but sometimes if you are lucky, you can get up ten rooms or even more! When you get unlucky and go through an exit with no special room on the other side you are transported to the beginning of the next level, just like you normally would after exiting the treasure room after defeating a boss.