Its probably the first thing that sticks out
The Pokemon TCG: Sword & Shield expansion includes a total of 202 different cards
Spielmechanik und bersicht aller Karten in einer App super zusammengefasst
Here's how the deck looks with the upgrades added: Also to pre-emptively address some comments: one direction that you can take the upgrades is to really lean into Sliver Gravemother's encore ability and turn the deck into a straight-up Encore deck -- Buried Alive and Entomb cards to put slivers into your graveyard, Convergence of Dominion and Zirda, the Dawnwaker to make encore cost less (though PSA Training Grounds doesn't work, I see people suggesting it but sorry no), Mondrak, Glory Dominus to double the encore tokens, Sundial of the Infinite to keep the encore tokens permanently -- that sounds sweet and all but you'd need to do a massive rework of this entire precon, turning it from a Go Wide Sliver Combat deck to Sliver Reanimator essentially
Gravekeeper decks are focused on getting Necrovalley on the field and then stunning your opponent so that they can not play their cards
Temur Adventures, by contrast, usually has Obosh, the Preypiercer as the companion, which means that it can't even run those even-costed spells if it wanted to