Mindleak

When the Dursleys abandon Harry in a forest, what was previously a clever trick - making the spiders in his cupboard dance - now becomes a tool for survival. The Avada Kedavra didn't only leave a scar, it tore part of his mind free of his body itself. Though Harry can manipulate the smaller creatures around him, will he be changed in turn? BWL!Neville, eventual MOD!Harry