You can see more about this Ordos tactic here.

Here, Atreides gets beaten by my deviator.   When you see a deviator headed for your forces, and all your forces have already fired, there is simply nothing you can do to stop it- or is there?  What could he have done to stop me?  The answer is to utilize a lesser known tactic that you will see many of the good players use:  an advanced carryall pickup.

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