Dragon's Blood Tree

In Harry Potter and the Sorcerer's Stone, dragon blood is discovered to be an actual oven cleaner. Dragon blood isn't completely fictional. What fans of the series also don't realize is that Dragon's blood is a red resin that is extracted from a tree called Dracaena Cinnabari or dragon blood tree. So, there is a something called dragon blood in the real world, and it comes from dragon blood trees. 

The real dragon blood is used mostly as dye although it has got some medicinal properties including its ability to induce abortion. In ancient times, Dragon blood was used as a dye, incense, varnish, and medicine. The tree species is now threatened with only a few of them left in Socotra Islands of Yemen.