The Sphere Builders reference article from the English Wikipedia on 24-Apr-2004
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Sphere Builders

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The Sphere Builders is a fictional species from Star Trek.

They are a trans-dimensional species that is bent on reconfiguring the galaxy with their specially designed spheres that would make it more habitable for them. They were first seen in ENT episode "Harbinger" and that was probably where they began experimenting with their spheres.

About 400 years in the future, the Sphere Builders were on the verge of accomplishing their goal when they created a habitable sphere about 50,000 light years in all directions. However, as Daniels showed Jonathan Archer on board the Enterprise-J, the United Federation of Planets engaged the Sphere Builders at the Battle of Procyon Five and ultimately pushed them back to their trans-dimensional realm, preventing a galactic holocaust.

The Sphere Builders have the technology to examine multiple timelines. Since they saw the future with the Federation, the Sphere Builders tried to change history in their favor by informing the Xindi of the 22nd Century (2152) that humanity would ultimately destroy them, so as to panic them into attacking Earth.