becoz i play summoner Nec alot, i notice he gets this negative mana rege after u play him sometimes, espcially if u went any inferno added areas that aint on the original diablo2 maps and get any type of hits on him, his mana will rege in negative way till 0 very fast unless u juv, 1 more strange thing is i notice when i put Thunderfury on him,it doesnt show on him