This is a form of “help-tag”.
All players, each with a ball, start on base at one end of court, except for one player starting as “IT” at half court without a ball.
Upon the whistle, the OTHER end of the court becomes base.
The players can only leave the end with a continual dribble.
The IT player can then tag anyone, until they get to the other end.
Once there, another whistle changes the base back to the other end.
Anyone tagged or losing their dribble goes to the middle to help tag the rest.
This usually works best with the IT players being able to move without the ball, but you can require them to dribble also.