My opponent had sivir level 2 with magic shield active and he attacked with this sivir and leblanc that also took the magic shield, but then when i used 2 frostbites made by the magic that cost 1 mana (the three sisters or whatever the name is) the magic shield on leblanc did not disappear and i wasted lot of cards and mana. It did not happened in ranked or normal but on a match with a friend, but i am still mad about it.