I've always had a soft spot for this card in casual play because of the silly combos it enables. I'm not a huge fan of the old brown artifact border, but Leveler always felt like a Mirage-era card to me anyway, so in this case, I'm happy with this.
Does anything else think that if they printed Leveler today, it would cost 2 or 3 mana and have Trample?
(I'm somewhat shamed to admit it, but I had an incredibly jank deck for 4+ player games that used Leveler, Demonic Consultation or Thought Lash to empty my library, Platinum Angel and/or Glacial Chasm to keep myself safe, and either Shared Fate or Timesifter to lock out other players or skip all of my remaining turns until everyone else decked themselves or removed one of the components. It never actually worked as a deck, of course.)