Like most Magic: The Gathering cards, the value of Xanathar, Guild Kingpin depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Adventures in the Forgotten Realms)
This is represented in-game with their extremely detrimental Pendulum effects that cause them to become almost unusable after one turn their Pendulum scales change to a much narrower spread, and they then destroy any monster their controller has in place with a Level not within their scales
Scolipede is a relatively cheap Stage Two Pokemon to run with 70 base damage for only two Energy
As for the monsters, both Fiendish Rhino Warrior and TGU are incredible support for the deck and then some
And the Investigators have the same mechanics as before (you have three actions on your turn, each action you can do is listed and explained)
When you buy from Backwoods Wizards, youre not just buying a product, youre joining a community of gamers who value quality, durability and style