Death Ball 

Set-Up: All players form into a circle. A dodge ball is placed in the center of the circle, "the Death Ball". If there are more than 10 players, use one Death Ball per 10 people. 

Materials: Everyone is equipped with a single shortsword. Anyone who controls the Death Ball may throw it as a projectile weapon, and hits from the Death Ball count as per a Fireball except that it does not destroy swords. You may pick up or otherwise touch the Death Ball ONLY if it is perfectly still; otherwise, if you touch it you die. Touching, hitting, or blocking the Death Ball with your sword is permitted so long as you yourself do not touch the Death Ball while it is in motion. 

Objective: Everyone has 5 lives. Wounds remain until death. When you are killed with a shortsword, you do not lose a life and return to life after a 20 count. If you are killed by the Death Ball, you do lose 1 life and return to life after a 50 count. Winner is the last player alive.