It takes some real discipline to not crack a fetch land or play a Cultivate, so you may be drawing multiple times per turn cycle
Szat himself is a character introduced in Fallen Empires' tie-in fiction -- and I do find it really nice that the cards do try their best to represent its lore
First of all, flash on a creature gives you the ability to bring it out at the end of someones turn and immediately swing or the ability to block an annoying attacker
You could discard it to pay a cost, because a spell or ability tells you to, or because you have too many cards in your hand during your cleanup step
The ability of this card, populate, matches the artwork well
Thanks to powerhouse cards such as Sheoldred, the Apocalypse and Fable of the Mirror-Breaker Rakdos has been utterly devastating, even outside of Standard