Mechanical Seed

Mechanical Seeds can "bless" a world with mechanical trees far larger than Living Wood the same way Demon/Crimson Altars "bless" the world with ores. They appear as brown circles with a swirl engraved on one side, like Truffula seeds from Dr. Seuss' The Lorax. The first tree occurs in the jungle while the second tree can occur almost anywhere on the surface.

Blessings

 * Mechogany (Mahogany) or Mechore (Makore)
 * Ironko (Iroko) or Pasteel (Sapele)

Trees
The trees are like a combination of Living Wood, Lihzard Temple, and Mechanical Mayhem. They are like huge Living Wood trees full of traps and mechanical monsters. However, they are very good to explore due to all of the chests they contain. Always take caution in here, as about a third of the chests are mechanical mimics, which are very dangerous AND they don't appear on the Lifeform Analyzer. Most of the monsters found in here are very dangerous but can drop lots of loot. They have the ability to blend in with the metallic wood and make their life bars nearly invisible. Don't come in unless you're prepared.