Before Innistrad, Zombies were exclusively the purview of Magic's black mana, but Innistrad revealed that a good Zombie is just one failed (or successful, depending on your goal) experiment away
That flavor text is spot-on too
Of course, they could exert for other reasons and avoid having to challenge, but if you can get something big enough of your own exerted, your opponents characters will crash against it and take themselves out
You can add one loyalty counter to create a 1/1 white and black Spirit creature token with Flying, and remove two loyalty to exile a creature you control and then also exile up to one target creature from every other player
At the beginning of each end step, if a player lost 4 or more life this turn, you draw a card
Adventures in the Forgotten Realms $306.45 The weaker of the two Dungeons & Dragons sets has to be Adventures in the Forgotten Realms