Protection Haunted One can be used both as a good offensive buff but most importantly, as a great mass protection spell that supports attacking since death can only make our army (and our commander) stronger
Since the deck is focused on reanimation, most creatures have high casting costs with the noncreature spell lineup built around getting those creatures into the graveyard
Reuse this method for anything thats not the norm moving forward
You will still see some Jund players sleeve up a set of Leyline of the Void, but it is also common to see a couple copies of Surgical Extraction, Nihil Spellbomb, and Grafdiggers Cage to cover bases in multiple matchups
However, a few different archetypes have arisen in Standard and Pioneer that all look to cheat Summon: Knights of Round into play in one form or fashion
So bringing back TSP isnt just a way to re-package a highly popular Limited experience or distribute flashy, old-border promos players have been asking about for years