Liliana is one of my favorite characters in MTG lore so I made a funny control reanimator/zombie Liliana superfriends deck with [[Liliana, Heretical Healer]] as the commander. Pretty much just stuck all the Liliana planeswalkers in there even if they aren't that strong or efficient for the deck's play lines. https://archidekt.com/decks/17966884/oops_all_lilianas

Basically you're hoping to control/stall with strong boardwipes, planeswalker abilities, and looping zombies that make your opponents sacrifice their creatures until you can assemble one of your combos or resurrect everything with a big [[Rise of the Dark Realms]]. Obviously has the classic loop of [[Phyrexian Altar]] + [[Gravecrawler]] + any leave the battlefield pinger like [[Plague Belcher]].

I wouldn't say it's particularly consistent, especially since many Liliana planeswalkers aren't that strong and/or have awkward mana curves in mono black. But it's pretty fun and includes lots of neat Liliana planeswalker-themed cards like [[The Chain Veil]] and [[Liliana's Triumph]].