pilica12
Buriallusion: Phantomic Killer in Night Mist
Seconding everything that Sondero said above. My personal advice is don't go for the 29 HP unless it is convenient (e.g. my Serperior just happened to luck out with the parent having that IV just in the right place, without me attempting to influence it), since the utility is not really that important to spend a lot of time slaving over.