Zendikar is a dangerous world of lethal risks and priceless rewards. From the perspective of its inhabitants, it is a hostile place that seems to be actively trying to kill the creatures that have the audacity to live there. The danger is unrelenting: precarious terrain, cunning predators, natural disasters on a massive scale, and the Roil?the unpredictable ripples of change that wash through the land?all present a constant challenge to survival.