This effect of your Legacy Energy can't be applied more than once per game
Instead, the non-standard sets have some variants with the Cosmos Pattern
So while at first glance this looks like paying five mana for three mana's worth of stuff that is all a little narrow or unexciting when it all comes together it is substantially greater than the sum of its parts
First, it introduced new mechanics and card types that made the game more dynamic and strategic
Remember: back in 2015, cards like Force of Negation, Force of Vigor, Assassin's Trophy, Fatal Push, Karn, the Great Creator, Counterspell, and friends didn't exist (or weren't legal in Modern), and decks were much, much slower and fairer, giving Birthing Pod a leg up on the metagame thanks to the consistency it offered
Landscape Plains This land stands in stark contrast to the previously showcased set