We generally use TCGplayer.com as the benchmark for card values, though, for many of these cards, the value can fluctuate wildly with what private sellers list them for
Islandwalk allows her to attack some players directly, otherwise she can be made mobile with enchantments that provide flying ability
It acts as an incredible anchor for dedicated villain deck users, forcing opponents to split their focus between dealing with lesser threats already established on the board or tackling the king himself to put a halt to the strategy
It might have a fierce stare for Arboreal Grazer, Longshot, Rebel Bowman, or, Poison-Tip Archer, but it won't threaten much
Note that cracking a fetchland counts as searching their library, so folks might not break that Terramorphic Expanse or their Polluted Mire unless they are needed, which is still a win for you as you slow them down
When Jill enters, return up to one other target nonland permanent to its owner's hand