It gains its name due to running things that infect your opponents units, it is built around Infest which is a fast spreading disease that turns your opponents units against them.
Because the deck has such an emphasis on positioning it features a bunch of position manipulation with lure, recombob, and repulsor. Grasp and thunder are natural compliments to the infest style both being good with our loaded positional tools, as well helping spread the infestation.
Infest has turned out to be surprisingly good tech for an aggro list. With the combination of fault, Eggs, and Wanderer running around there are a lot of targets and ways to get this spell to push out tons of damage. It also works perfectly with grasp of agony allowing you to pull off craziness, particularly against fault, like infesting and grasping a target, kill it, the infest spreads to two other targets, then grasp kills them, spreading the infest again!
I really wanted to run Komodo Hunter to the list as he is such a cool card that could compliment our style, but hes really awkward and there just was not room. If you were determined to make him work the best way I can see to fit him would be to cut blazehound and recombobulus for replicant and komodo.
Mix that with most of the staple aggro tools and you have your self a pretty scary list. With a sideboard available you can side out your infest and position manipulation into a more traditional darkseed deck for when you come up against creature light decks and or Burn. And of course Betray is just a fun situational tech card that can single handedly shut down archetypes like titan.
The deck has the potential to be highly competitive, but it is very difficult to play as infest is a weird card, positioning is incredibly key, as is resource management, and should the deck gain popularity people may be more likely to play around its various tools. Those details combined earn it only a competitive rating for now.