Hard plastic products: All kinds of PVC, PET, PP, PETG transparent or frosty plastic boxes, folding boxes, cylinder and other shaped boxes, which can also do color printings on surface
On the one hand, you'll definitely get more value out of your energy-producing creatures than your opponent will, but you really don't want to give your opponent blockers, so it gets cut
Additionally, it only has 140 HP which puts it at risk to loads of common Stage 1 Pokmon that could clean it up in a couple of turns if Porygon-Z is out for too long
What does Root Sliver do
On top of that, actually having multiple sacrifice triggers each time a creature dies is your main wincon
Effect: You can Special Summon this card (from your hand) if you have a "Keyblade" monster in your Graveyard