Land destruction in this game, if used early, is very overpowered. Obliterator destroying 1 land per turn or Quicksand destroying 3 lands for a single card...it doesn't really matter.
Look at it this way: Oty's once played can eat any creature x/2 or x/4 (upgraded). They can eat bigger creatures if you have smaller creatures to feed them. Unless fed, they cannot even do damage. There is a multitude of ways to counter an Oty from creature destruction, reverse time, Eternity, infection or just plain using bigger creatures.
Pulverizer can destroy ANY non-creature in the game that is not protected including pillars, shields, other weapons. Pulv can only be countered by 3 cards: steal, deflag/explosion and another pulv.
An enchanted pulvy in the early game is the closest thing to an "I win" button this game has.