Isobel will be able to use this ability to show herself glimpses of the future by smashing a mirror. Each broken shard and piece of glass will then display an image which will not be a normal reflection: it will show clues of the future. She could ask specific questions about the future if she thinks them while breaking the mirror. Otherwise, the future events portrayed will be fairly random. There will be a flow or causality to the connections between the predictive images, but these will often be difficult for her to interpret. The ability will only work on a mirror once - if she tries to use it on a previously generated fragment it will only reflect.