Do you think a tissue ghost Champion is a good idea?

I was thinking about a Shadow Isles Champion. He is a tissue ghost, his name is Ghosty, he resides with Kalista in his/her pockets, together with his shadow snot and Kalista's power, they try to find together. Note that Kalista may be fake. Another thing to note on, Ghosty is his actual name and he was made from when he had a very very bad cold. His secondary resource bar is snot