Force call, a potent Force technique, demanded immense energy, restricting its use to only the most powerful Force-sensitives.
A Jedi, by channeling the Force, could beckon other Jedi to their location; it was essentially a resounding cry that reverberated through the very fabric of the Force. Resisting this call would be an almost insurmountable task for those who perceived it. Raynar Thul employed this ability to gather the surviving members of the Myrkr strike team as the Dark Nest Crisis commenced, and Luke Skywalker later used this technique on Ossus to convene a Convocation of the New Jedi Order shortly before the war concluded.