The Earth Crystal is a counter doubler, and cost reduction, at four mana
If two creatures with one of these triggers fight each other, the value you can generate is obscene
The Scrabblers allow us to pull creatures back to our hand, the most useful ones being discard outlets, though anything we recur is pretty fine - Other Options - Biting Rain Works best against aggro or token decks, but hits our own side quite hard, though this isn't ALWAYS a problem, especially if we have a lot of Shambling Goblins out
Field of the Dead, Isochron Scepter, and Myrel, Shield of Argive are all fantastic reprints in the Countdown Kit
Rather than playing out aggressive creatures and smashing through opponents, they create a situation where the prospect of blocking doesnt matter
I also find it really funny that its also just a random Short Sword while its not doing its thing