Legendary Caster Staff Stats

While I haven't seen any details on how this is acquired, it's safe to assume (since this information was most likely data-mined from the patch 1.11 files we currently have access to) that it's going to involve Naxxramas.  I must say, these staves – different for different classes – look perfectly delightful and I would be happy to have one – though I can't say I look forward to the no doubt extensive efforts required to get it.