Geezuz, it tells you where the Lumber comes from right in the uper right corner of this page. Alla, please delete posts like this one and all other worthless posts andyone has ever placd on this site, waste half of my time reading a bunch uff bull@#$%. 60% of you people who post on here are worthless posters, please stop posting garbage for us real players.
This Lumber drops in multiple different ENM battles.
All @ 75 - Bionic bug - Brothers - Holy Cow - Shell We Dance - Totentanz
As you can plainly read at the top of this page to the upper right.