Like most Magic: The Gathering cards, the value of Plains 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 (Amonkhet)
I don't know how practically good it is, but in theory, you could play around putting yourself to sleep, via switching, evolving, xatu, etc
Green also uses creature tutors and fight mechanics to maintain control of the board
And everyone in the world is me! 4/3 Illustrated by Lie Setiawan Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
Reshiram ex Special Illustration Rare, 166/086 As the mascot for the White Flare set, its no surprise to see Reshiram ex on this list
They return a creature they control to its owners hand