Just about all the traditions in that book are kind of shit. They all have a bunch of special-snowflake rules, some are just strictly bad because they only penalize you compared to standard traditions, and Necro Magic is directly referencing the Swamp Thing mythos, along with Red Magic and Green Magic, which really upsets me. Swamp Thing is still fiction in Shadowrun, and it is so sloppy and lazy to just start pulling from other IPs. I mean, really? We have DC stuff in Shadowrun now? Shadowrun's got enough setting details of its own, it doesn't need to risk bloating the setting even more by using Swamp Thing and Cthulu, but somebody decided "why the fuck not" and nobody stopped them.