I'm reminded of Zimone, All-Questioning from the recent Duskmourn Commander precon, which required the user to hit prime numbers of lands
Rip, Spawn Hunter Rips ability fits naturally with vehicle-heavy 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
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
It has a lot of customizability since its meant to literally be a casual deck of your favorite cards
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