terraria - What exactly do the yo-yo accessories do? - Arqade
Specifically it will travel over your head, most of the time. With some quick testing they appear to deal about 70% damage of the yoyo. The Yoyo Glove allows one yoyo to be used twice per fire, so it will duplicate the Yoyo you are wielding when you attack a mob, making the duplicate Yoyo travel in a circle around the original Yoyo thrown.