"xD i know fiora with thornmail is unusual even more when building ap items, but as fiora in another timeline progresses as her foes becomes even more stronger and meaner, she has no choice but to advance the magic that leblanc gave her, and in her intense training against physical attacks she found the answer. It would be much better to reflect her foes attack towards them instead of tanking it and that is where she uncovered the ancient thornmail that was formerly exclusive to champions that were tanking for their allies but that is no longer the case. Now she infuses this relic with eldritch magic eventually turning it into her own defensive equipment that she uses for her own benefit"