Charcter ablity quere

hello, I am now making a game called " the big bad world" and I am coding the abilities of four characters that you may choose from right now. now right now I am trying to focus on one thing, the old man who you get when you pick wise has no ablity. I can not think of one and one character already has a dash ablity, ones going to shoot projectiles and ne will be a close range fighter. what should my character do as a ablity?

He must have unlocked the whole of his mind with all the years he lived. He can telepathically damage minds and heal others.

this makes sense but due to how hp works, but making him able to hurt stuff through walls seems a bit too OP. I think Ill pass, thanks for the suggestion though!