Player 1, standing at the net, performs a block movement, and returns back to zone 1 behind the attack line.
Player 2 (standing close to the net in zone 4) then hits the ball to player one to mimic an opponents spike.
Player 1 then digs up the ball to player 3 (who is standing close to the net in the centre of the court), who then sets up player 1 to finish with a right side attack.
The drill is then repeated.
Using a fourth player the ball can be fed from a different position during the drill. So as player 1 returns to his zonal position, player 4 (standing near the centre of the base line) feeds the ball to player 3, who sets up the ball for player 1 to finish with a right side attack.
As roles in Zone 2 and 4 are similar this exercise should also be done on left side of half-court. You may also want to insist on accuracy from your players e.g. in digging what is difficult on strong kills.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.