In My Name, In Mighty Prayer

This sounds like an ordinance, because Christ lays his hands on his disciples and calls them by name.  What is "mighty prayer"?  It's what the children of God do together in private.  It's how Nephi prays in the presence of the Lord, drawing down ministering angels.  It's how Enos prayed.  It's how Alma prayed for the people of Ammonihah.  And it's what the disciples were engaged in after Christ's ministry among the Nephites that drew his return.