1st gen pokemon card set Base Holo Rare Alakazam #1 [Lightly Played] If heads Best 1st gen starter :

Many cards feature the Lost Zone mechanic, like Colresss Experiment [Lost Origin], and have a risk/reward playstyle

Shares of Nintendo Co

The card I actually like best on this list is Volraths Strongholdwith better creatures coming out each year, this utility land should never go down in price

The alternate art

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