zombie-illithid asked: How would keeping the Eldrazi alive but sealed possibly not disturb any ecology they might be a part of? If someone captured all sea otters and kept them alive and out of the ocean, the sea urchin population near California would explode and they would eat the bottom of all the kelp, which kills all the kelp, which would destroy habitat of other life. It doesn’t matter that the sea otters are still alive (reintroduction prospects aside), what matters is they aren’t in their habitat.

The Eldrazi titans originate from the Blind Eternities, the chaotic un-spaces between the planes, not from Zendikar. They were introduced to Zendikar’s ecosystem 6000 years ago, when Ugin/Sorin/Nahiri trio lured them to the plane. And then the Eldrazi were sealed away, so they didn’t have a chance to become part of Zendikar’s natural systems in any real sense. (The Eldrazi are basically wreckers of natural systems, rather than elements of same.)



Also, in its own way, Zendikar’s environment DID react to the Eldrazi being brought to, and then sealed within, the plane. The landscape-twisting phenomenon called The Roil is a symptom of Zendikar’s reaction to the Eldrazi’s troublesome presence. Zendikar’s terrain reacts like an immune system, becoming more active/stormy/changeable/predatory when the Eldrazi rise to feed on its life energies.

