Proactive Mod is a mod which add "Proactive" and "Waruactive". They can make part of your world flat easily!!
(Proactive is a cream which can remove acne from skin of people. Ups and downs of the world is similar to acnes...)
After you hold Proactive or Waruactive, you just right click!
Proactive: Craft Milk Bucket x 1 and Leather x 1 together.
Waruactive: Surround Proactive x 1 with GunPowder x 8. Then you will get a Waruactive!
Silk Touch Mode
Newer than ProactiveMod_x.x.x-2.0.0, you can use SilkTouch with Proactive.
Press P button(you can change this key from settings) to toggle the mode.(Normal or SilkTouch)
In SilkTouch mode, every time you use Proactive once you lose 1 level.
If you don't have enough level, thrown Proactive works as Normal mode.
Newer than ProactiveMod_x.x.x-2.1.0, you can set up the amount of level to reduce when using Proactive in SilkTouch Mode in config.
# Configuration file
# Amount of level to reduce when using Proactive in SilkTouch Mode [range: 0 ~ 10, default: 1]
Originally, shu3 made Proactive Mod on Minecraft version 1.6.4. I just reshuffled the mod to 1.7.10, 1.10.x, 1.11.x, and 1.12.x.