The Chosen Ones

plz check out Fradz's set item, it said have 10% chance on casting to create an illusion of Fradz but actually, it's 100% and every I cast a spell, it make a terrible lag, can't fight with this! And some skill did not work as it supposed tobe, like Ground Zero, it said enemy unit will take dame over time after spell cast but it not, or upgrade spell book Impale, i choose more damage but actually it's recharge cooldown, some wrong here.