User blog:Zephyr47/Es in thrid arc

how do es work in third arc i level my earth element up to 43 to unlock es for 5 star units but idk if there working cuz i put bb elgifs on some but i didn't feel like they got bb more often then they used to so i put a stat elgif on one of my units and its stats didn't get raised at all so am i doing something wrong here? and yes before someone ask i put them on earth units.