Suddenly there is a new increase in the demand for Crystalline Blackrock. People need 20 Crystalline Blackrock to bond the new tameable creature, "the Bane Dragon". Blackrock Stew, the only known thing that they eat, can be obtained by completing the Dragon Food quest where you need to obtain 20 Crystalline Blackrocks. While Bane Chosen Dragon Riders can make their mounts perform breath attacks, tamed Bane Dragons lose such abilities.
Dragon Food is a quest offered during the 'In the Shadow of Virtue - Rise of the Bane Chosen' event by the Bane Chosen Bounty Collector who can be found in the Bane Chosen camp in the Lost Lands Desert. You need to have at least 2000 loyalty points for the Bane Chosen to be able to take the quest.
Below is a description of the Bane Dragon from UO Guide:
The Bane Dragon is one of the creatures introduced with the event In the Shadow of Virtue - Rise of the Bane Chosen. Just like Chaos Dragoons rode Swamp Dragons, Bane Chosen Dragon Riders ride these creatures on their war against Ophidians. The Bane Dragon can also be found inside the Stygian Abyss Dungeon (it is located in the buildings were the Slasher of Veils likes to roam around and cause Chaos). Animal Tamers must have a minimum skill of 107.1 to tame a Bane Dragon and they can bond with one. They should be beaten into subjugation before being tamed. Requires 3 control slots.
They are very similar in stats, hit points, and abilities as the Dread Mares!
Info on the new Quest can be found here:
http://www.uoguide.com/In_the_Shadow_of_Virtue_-_Rise_of_the_Bane_Chosen
