For thousands of years, Zendikar has had a reputation as a deathtrap. It's been a world of deadly perils to planeswalkers and native explorers, punishing any who seek to loot its hidden treasures and exploit its potent mana. But unknown to the plane's denizens, there's a sinister reason for Zendikar's danger: for millennia, the plane has served as a prison for the Eldrazi, astral monstrosities native to the Blind Eternities, the space between planes. Now, the perils facing adventurers on the plane of Zendikar have taken an even deadlier turn. The Eldrazi have been released.