You may choose 1 character on your stage with level lower than or equal to your level, and put it into your waiting room. If you do, search your deck for up to 1 character with the same level as that character, put it on any position of your stage, and shuffle your deck.
Choosing a selection results in a full page refresh.
Press the space key then arrow keys to make a selection.
Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device