Dragongrass

Dragongrass grows only in the Cragspire Mountains. It is a magical grass, which is the fuel for dragon flames. There are three types of dragongrass and they have different properties.

What it looks like

Dragongrass has pointy green leaves, which are thin and very shiny. Their colour ranges from light fern to dark sage.
It grows in clumps, spreading across an area. Big clumps are knee high, while many others are smaller. They grow interspersed with normal grass, so unless you know what it is, you would assume that was what it was.

Types of dragongrass

There are three different types of dragongrass, which give the dragons different abilities when they flame. Each type is digested within their second stomach, and then expelled as fire. One is used for burning, one for healing and one for binding.
The healing grass is a light fern colour, and creates red flame. The burning grass is an emerald colour. This is the most prolific and creates yellow orange flame. The binding grass is a darker sage colour and produces purple flame.
Binding grass is the most useful, as it allows the dragons to do the most variety of things. They bind people together, ensuring their loyalty. First this was done with the boy dragons to their sister, for their role as her brother guards. It can also be used to link items together, to open locks, to create wards, and to bind powers.

Role in the overthrow of the dragons

Without dragongrass the dragons can't produce flame. This was the secret that Queen Soovi explained to the humans, allowing them to help her capture her mad brother. Later they used the knowledge against her and the other dragons.
While a dragon is a fearsome beast, they relied on their ability to burn anyone they were fighting. When that was taken from them they were able to be swarmed by the number of humans fighting them. Many humans lost their lives to rid Kaitstud of dragons.