It adds a bunch new hammers and crooks made with Botania resources. They all consume mana to repair.
The Elementium Hammer spawns pixies to protect you from nearby monsters. The range and spawn chance is configurable.
The Terrasteel Hammer has a higher range while breaking and benefits from Ring of Thor.
The Dreamwood Crook will also have a chance to still drop saplings when breaking leaves.
This mod is compatible with Ex Compressum and adds compressed variants of the hammers and crooks when loaded.
Here you can see an image of all the items: