Leon looked at the window when the ice melted, as Joe picked up the pieces he examined the windowsill 'that ice should have lasted the rest of the week at least, even without be magically sustained' he thought as he looked, he raised his hand and tried to cast again but found that he was unable to 'strange, does the school have something to suppress magic?', he took the gauntlet of his right hand and tried casting with it, he managed to get a thin layer of ice over the window, however it was a bit of a struggle and would likely only last the night.