Scientists have witnessed significant breakthroughs in s-block metal chemistry. Over the past few years, several applications in catalysis associated with alkaline-earth metal catalysts have been established owing to their abundance and lower cost. These catalysts have proved to be essential alternatives to transition metal catalysts. Several research groups have recognized the importance of magnesium complexes as highly active metal catalysts in the reduction of a series of unsaturated substrates for the synthesis of ubiquitous compounds necessary for industrial purposes. This minireview presents, based on studies published in the past recent years, a detailed discussion of catalytic hydroelementation on C–X (X = C, N, O, B, Si, S) multiple bonds, promoted by novel magnesium metal catalysts. © 2021 John Wiley & Sons, Ltd.