This study looks at the ways how the Reformed Church encountered the new modern mission movement in Transylvania with the arrival of Dr. Béla Kenessey and Dr. István Kecskeméthy to the newly established Reformed Theological Seminary at Cluj in 1895. By the time being, some theologians expressed grave concerns about the dangers of theological liberalism to the Confessions. The paper argues that these young professors, touched by the mission movement and revival also sought to encompass those who had an evangelistic fervor to reach unbelievers and to serve those people in their personal and social needs. As a result, Christian Covenant was established in 1896, with official recognition in 1903 as the Christian Endeavor. It is hoped to unfold the major shifts regarding the attitudes to mission in the Reformed Church of Hungary and throw lights on ambiguous beginnings of mission movements.