Rise of the Eldrazi

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.

The Eldrazi have transcended the colors of mana as we know them. As a result, the Eldrazi progenitors themselves and those closest to them are colorless. But don't let the mana cost fool you—these Eldrazi are not artifacts. Each of the colossal Eldrazi spawns its own "brood lineage." The three brood lineages are composed of Eldrazi Drones and other subordinate beings, each reflecting the image of its progenitor.