Bouncing Billith’s Bubble Ball

When this spell is casted 2 people of your choice have a piece of gum like substance appears in their mouths. On a reaction to an attack spell you can blow the gum into a bubble that engulfs you (up to a medium creature) when the spell hits the bubble the attacker has to roll a charisma saving throw against the person who casted this spell’s DC if failed the attacker takes half damage while if successful the person in the bubble takes half damage. Even if spell doesn’t hit bubble still pops after the turn you reacted to is over. After spell ends you have a piece of gum forever on the bottom of your shoe. If unused the spell lasts for as long as it has flavor.