The expansion is confirmed to include cards of every single Pokemon from Black and White's Unova Region, with each one getting an Illustration Rare or Special Illustration Rare
Plus, it lets you untap target land, so you can even use it as a political tool to help another player out in removing a problematic permanent
They give you a lot more mana upfront but only one shot of it, meaning you cant reuse them turn after turn
Meanwhile, Sinister Gnarlbark gives card draw similar to Phyrexian Arena, except it triggers on your end step and costs Blight
It has a narrow window to interact with and puts a clock on your opponents, especially when paired with effects like Sanguine Bond and Bloodletter of Aclazotz
Compare the photo of the card to a real image of the cardthere are many databases online that show official card images (like for Pokmon, Magic: The Gathering, and Yu-Gi-Oh!)