Mutandis Extremis

The Mutandis Extremis is an item from the Witchery mod. This item is an upgraded version of Mutandis. It can mutate multi-staged plants like Wheat, Cactus, and Sugar Canes. Mutandis Extremis can also turn Grass Blocks into Mycelium, and underwater Dirt blocks (and the dirt around them) into Clay blocks. Mutandis and Mutandis Extremis are the only way to acquire some Witchery plants, like the three magic trees, Rowan Sapling, Alder Sapling, and Hawthorn Sapling. Mutandis Extremis can transform cooked meat into other cooked meats, like Mutandis. It is used in several Witchery crafting recipes.

Usage
Simply use the item on any plant block. The plant you obtain by doing this is random, so it is recommended to get lots of Mutandis Extremis if you plan on performing magics that require many different forms of plants.