Train the change between short combination passes and long transfers, and make players use both arms of the shape rather than favouring one side. The long balls have to be accurate enough to land on a marker twenty metres away.
Lay four markers in a Y: two arms at the top about ten metres apart, and a stem running twenty metres down the middle. Five players. Play a one-two at the junction you are at, then a long ball up one arm. Combine again at the top, then send it back down the stem, and go up the other arm next time. Alternate arms strictly. Two touch, and a carry of a few metres before a long ball is allowed.
The Y is one of the oldest passing shapes and it usually gets run as a single-length exercise. Ball up, ball back, everyone passing at roughly the same distance, and the shape may as well be a straight line.
Using it properly means the arms and the stem do different jobs. The stem is long, twenty metres or so, and the junctions are where short combinations happen. That gives an alternation, three metre return then sixteen metre transfer, that repeats every few seconds. Switching weight that frequently is meaningfully harder than either pass in isolation, and it is the thing this shape is actually good for.
The rule about alternating arms exists because groups will not do it otherwise. Left to themselves, the ball goes up the same side every time, usually the one that suits the majority's stronger foot, and half the shape becomes scenery. Calling the arm before playing it is a small discipline that keeps both sides live and adds a communication element at no cost.
The technical point that gets missed is receiving the long ball. Twenty metres arrives with pace, and a player who is square to it needs a touch to control and another to turn, by which point the combination at the top of the arm is late. Opening the body while the ball is travelling turns two touches into one, and over a session that difference is the whole tempo of the drill.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.