What card beat it to the four-spot
They're forced to grant the humans Mountainwalk as they are forced to lead the humans to their mountain home
It no longer has the ability to double as a removal card, but being able to untap lands will prove useful in the right decks
Since Siege Zombie's activated ability doesn't have a tap symbol in its cost, you can tap creatures that haven't been under your control since your most recent turn began (including Siege Zombie itself) to pay the cost
Its easy for Magics best and brightest players, bloggers, and writers to say Buy the best cards, Play the best decks, or Test as much as you can. Most of them do this full-time, or as their main hobby, at least
Rip, Spawn Hunter Rips ability fits naturally with vehicle-heavy decks