Little by little, people played with the split cards and found them a lot of fun
Many of the best equipment and equipment payoffs simply weren't in print at the time, like Colossus Hammer or Sigarda's Aid, and ones that were in print (Stoneforge Mystic, Puresteel Paladin) weren't included because that's how precons roll, I guess
negate the next attack this turn from a monster your opponent controls (this is a Quick Effect)
Cards like Soul Warden, Ajani's Welcome, Kor Celebrant, and Impassioned Orator can turn the smallest token into a big buff for your creatures, while it can combo with stuff like Spike Feeder, Fathom Mage, and Horizon Chimera for infinite lifegain
Destiny Draw allows the user to draw any specific card remaining in the deck during the Draw Phase