From MTG Salvation Wiki
The Tangle. Art by Mark Tedin.
The
Tangle, a huge expanse of copper structures rising out of the metal ground, encased in green verdigris and mold, with wires and metal extensions serving as leaves and vines, is the closest thing to a forest on
Mirrodin. An abundance of diverse, mutated organisms live in the Tangle, such as the
vorrac and the
fangren. The
elves make their dwellings in the tree-like metal spires here, under the guidance of the
trolls, the keepers of
Tel-Jilad.
Sylvok druids also inhabit the Tangle.