Right around turn 5, or even earlier if you are playing cheap cards, the game can devolve into drawing one card, and playing the one card you just drew
While the variance can mean whiffing a bit, there are ways and decks capable of doing such things
Also sweet in Ojer Taq, Deepest Foundation / Temple of Civilization and other token making decks
Clearly, this was an ability that Wizards of the Coast liked using over and over
The call here was that while there are a lot of places where the card needed to be modified into a vertical aspect, being horizontal was an important part of the identity of battles, and it helps communicate just how unique this new permanent is
Bigger planets are known as gas giants and do not have a rocky surface