slow poison can't work

[Icy]

the dryad have the skill slow poison which slow target but if u gave that skill to another unit, that skill does nothing, no slow, no poison.

 

[Accname]

works like a charm for me. you have most probably made a mistake somewhere.

 

[vypur85]

Slow Poison is an Orb effect ability. See if you have any other Orb abilities that might disable the former.

 

[Bogrim]

In addition to what vypur85 said, not all weapon types work with poison attacks. The unit's weapon type must specifically target only one unit, ruling out types like Artillery and Splash.

 

[X-maul]

use the ability named "Poison Sting"