Magic Deficiency Disease (魔力欠乏症 Maryoku Ketsubōshō) is a term that refers to when a Mage is rapidly deprived of their Ethernano, causing them to contract an illness.
Description[]
Magic Deficiency Disease causes the recipient to fall ill from the rapid loss of their Magic Power, which can either be from using a massive amount all at once or having it drained from another person.[1] In dire cases, the disease can cause death if deprived enough of their Ethernano.[2] Cures for this disease include potions and medicines to replenish Magic, as shown when Porlyusica created elixirs to cure Wendy Marvell and Carla.[1]