If you've already got a lot of cards from The First Chapter, apart from the guaranteed foils in the 2 decks, it might be more cost-effective to put your money towards boosters, unless you're looking to pick up the cards from either of the starter sets quickly, then the fixed nature of the decks will get you those quicker than randomized boosters
There are cards out there like Sakashima of a Thousand Faces that negate the legend rule, so putting these two cards in a deck together is a wise choice
Fist of Suns [Dragon Deck]: From Fifth Dawn
The oldest foils, from sets like Urzas Legacy and 7th Edition, frequently run for more than $300 a pop
Doing so gives all your cats hexproof and indestructible for the turna powerful surprise that turns defense into offense or saves your board from a sweeper
Jurassic Worlds double-sided Land cards offer fresh perspectives on iconic film locales across Isla Nublar and Isla Sorna, with the Forest card being my favorite