Duelists Arena

You create a 40 ft sphere of Abjuration magic, centered on a point you can see within range, designed for combat practice and casual duels. While in the sphere, any number of creatures may fight, with all injuries, conditions, and hit point loss dealt by and to creatures within the sphere disappearing once they leave. Creatures that fall to 0 hit points within the sphere are incapacitated but do not fall unconscious or make death saving throws, and are shunted outside of the sphere if they are still at 0 hit points at the start of their next turn.