Sadly, the ability to get non-Forests to fix your color concerns likely will never come up since there are so many good colorless lands available for mono-color decks to take advantage of
It also applies to other cards like fetch lands and pretty much everything that should go to the graveyard after it's used
So, what does it do, exactly
Filling your graveyard is relevant in Foundations too, since there are a number of solid reanimation tools in the set
The subject in the artwork is being harassed and experimented on by all manner of painful looking implements, and the machine like nature of the invasive surgery makes it feel even more unsafe, and unclean
If the creature you're targeting has Toxic, you'll get an extra two damage