That is not a bad little effect, and every bit of Lore helps
Many players and LGSs didn't understand that there was a significant different between the formerly successful Jumpstart products and these Standard-adjacent releases that used the same name, and so many players and stores got caught with excess product after players realized the packs weren't as good
Hence, if you control five Slivers, then theyll all get a +5/+5
After that it will shortly disappear on its own, so perhaps theres no need to expend extra effort to remove it
You can also take these decks into the MTG Arena App, with redemption codes provided that match the contents of each deck, a Magic Play Guide to help you brush up on the rules, and themed deck boxes, keeping your favourite characters safe