Yes, these two working together. Although, Jace was leaked and the pictures aren’t very good, so, here’s Liliana.

Jace is a looter and if you have enough cards in your graveyard (five), he flips. The planeswalker reduces the power of a creature by 2 until your next turn (+1), casts an instant or sorcery from your graveyard (-3) or gives you an emblem for milling your opponent (-9). These are all pretty useless in this deck. We want the looter, although being able reuse [scryfall]Thoughtseize[/scryfall] at opportune moments is often great.

This probably isn’t a workable idea, but I’d like to try it anyhow, black and blue being my favorite colors, so I would like this to work. Anyhow, here’s an idea.

[deck]
[creatures]
2 Liliana, Heretical Healer
3 Jace, Vryn’s Prodigy
3 Dakra Mystic
4 Palace Familiar
4 Jeskai Sage
3 Tasigur, the Golden Fang
4 Gurmag Angler
[/creatures]
[spells]
4 Hero’s Downfall
4 Thoughtseize
4 Anticipate
1 Corpseweft
2 Ashiok, Nightmare Weaver
[/spells]
[lands]
4 Temple of Mystery
4 Polluted Delta
4 Evolving Wilds
5 Island
5 Swamp
[/lands]
[/deck]

So, we have draft stalwarts [scryfall]Palace Familiar[/scryfall] and [scryfall]Jeskai Sage[/scryfall] to chump block early to fill the graveyard and draw us cards. [scryfall]Dakra Mystic[/scryfall] and Jace have similar roles. Liliana can also fill the graveyard, as well as the eight fetches. The deck might even use a [scryfall]Flooded Strand[/scryfall] or [scryfall]Bloodstained Mire[/scryfall] or two for tihs purpose.

All this to get out an early Tasigur or a Zombie Fish. [scryfall]Corpseweft[/scryfall] competes for the same resources, so we could probably cut it for something else. Ashiok brings another angle the deck can fight from.