Create new special blocks/links following these examples...

[alhassy]

0. Look at http://xahlee.info/js/css_index.html
1. Find something you like there
2. Implement a special block that produces the CSS feature you like
3. Add some unit tests (ert-deftest)

For example, text shadows give way to a new link type which can be used in the form <shadow: Moonlight > to produce the example shown in the URL. We can also make this into a special block and then use :option value header arguments to allow a variety of inline styling options.