Drix Fatemaker grants trample, which makes it easier to draw cards with Haliya, Ascendant Cadet
(More specifically, this perception of randomly distributed clumps as having some underlying reason is called the clustering illusion.) Similarly, lets say we have a deck containing 30 Plains and 30 Swamps
Split cards have two card faces on a single card
This was great if you knew what the top card of your library was, via a Sylvan Library for example, but depending on what your ante card was, it didnt matter
Its amazing upside for these costs is that you can pay to gain 1 life as many times as youd like
For example, if you are being attacked by two 3/3 creatures and you block one with a 2/2 creature with lifelink, your life total will decrease by 1 even though you've gained 2 life