Blood of Dragons (spoilers RotE incl City of Dragons)

['thul]

These beings converted them to links. That should be enough. If it isnt, then these beings apologize.

Those weapons did not look like weapons of war. These beings do not like to burst your bubble, but its very, very unlikely that they are wizard-wood based. Aside from the Tarman, there is no wizardwood anywhere near the dragons. And the keepers respect dragons too much to take wizardwood away from them. The memories within are too valuable to the dragons. Especially in such a critical stage for the dragon species.

In a stage where dragons are many and the population stable, they can afford to use some cocoonwood on things other than gaining memory. In the current RotE stage, such is not possible. It is only through it serving a bigger purpose in its current form that they even allow things like Tarman to exist.