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If one has multiple Slaanesh Daemon Princes within 3" of an enemy unit, and the enemy activates that unit to attack, can all of the Princes be used to strike before that enemy unit attacks? Or just one of them?

For those who are unfamiliar, a Slaaneshi Prince within 3" can pile in and attack immediately before that enemy unit attacks.

they can all pile in and attack, because there is nothing in the rule that states differently