Here are a couple: Cyan: Vengeful Samurai is not an easy card to get out given his high cost of 7 Mana, but this can easily be brought down as this number is decreased by one for every creature in the Graveyard
What character did you want them to add who didn't make the cut
We might see more or less of this, but the name not referring to a specific IP might help
Terra, Magical Adept found a home in Jund Roots as a self-mill engine that digs for Insidious Roots
There's also Pitiless Plunderer and Morbid Opportunist here which I thought would hint at a Sacrifice subtheme here but nope, there's 1 sac outlet in the entire deck (Shadow, Mysterious Assassin) and like two or three cards that sacrifice themselves (Priest of Fell Rites) so maybe these are either random "hope for value" inclusions or maybe the remnants of a previous version of the deck that focused more on Sacrifice, who knows
Just playing around with mechanics and flavor, I believe shell have the Flash keyword, and on ETB shell deal three damage to something