Innovations in Modern: Grixis Death's Shadow

Hello everyone, my name is Tim Tscheppe and I’m here to write about my favorite format: modern!
First, I’ll give a brief background about myself - I have been playing magic since M14, and was first introduced to the format via modern. I started playing competitively around Khans of Tarkir, and have been hooked on modern ever since.
History of the Deck
Death's Shadow, a card that's been in the format forever, came into its own in 2010. A 13/13 for one seems pretty good, but the drawback of having to be almost dead scared people away until then.
Death's Shadow began to be slotted into hyper aggressive zoo builds that used cyclers such as Gitaxian Probe
On January 9, 2017, Gitaxian Probe
Death’s Shadow Jund
Many people still saw further potential in Death's Shadow
To run even more threats (and to fuel Tarmogoyf
A New Contender
With the glass-cannon esque deck of DSJ was at the top of the metagame, brewers tested blue as the tertiary color of the Death's Shadow
Most importantly, Grixis Death's Shadow
Looking Forward
The modern metagame is dynamic and ever-changing, which breeds adaptation. One of the most recent innovations to Grixis Death's Shadow
These planeswalkers can take over a game on their own if unanswered, and provide lots of value in an attrition based matchup like BGx or Control. Additionally, more than one type of Liliana can be on the battlefield at once thanks to the new planeswalker rule, providing a steady stream of value. The Young Pyromancer
Finally, Liliana of the Veil
Wrapping Up
I'm currently on the following list, which utilizes the newer sideboard cards but still is super aggressive, running two Temur Battle Rage
2 Blood Crypt
3 Bloodstained Mire
4 Death's Shadow
4 Scalding Tarn
4 Fatal Push
2 Temur Battle Rage
2 Inquisition of Kozilek
2 Dismember
1 Kolaghan's Command
1 Island
4 Polluted Delta
4 Serum Visions
4 Snapcaster Mage
1 Steam Vents
4 Street Wraith
3 Stubborn Denial
1 Swamp
2 Tasigur, the Golden Fang
4 Thought Scour
4 Thoughtseize
2 Watery Grave
2 Ceremonious Rejection
2 Young Pyromancer
1 Liliana, the Last Hope
2 Collective Brutality
2 Liliana of the Veil
1 Izzet Staticaster
1 Kolaghan's Command
2 Kozilek's Return
1 Terminate
1 Stubborn Denial
Grixis Death's Shadow has proven to be able to adapt to the metagame, and is now evolving to play with a strategy similar to traditional Jund. What do you predict will become a staple of the deck in the future? Feel free to share any thoughts or ideas with me on here or discord!