Thanks for the feedback!
You gain a lot of rewards after purifying the tree, so I wanted to make them tougher.
But there will be more balance changes in the future, if it feels to slow.
Ahhh. I didn't realize that there is now a reward after purifying the tree.
On the topic of balance changes, will there at some point be a value to turning in the Necromicon, instead of becoming a Necromancer?