This is a command meant for item scripts to replicate single-use skills. It will
not work properly in NPC scripts a lot of the time because casting a skill is
not allowed when there is a message window or menu on screen. If there isn't one
cause you've made sure to run this when they already closed it, it should work
just fine and even show a targeting pointer if this is a targeting skill.

// When you use Anodyne, you will cast Endure(8) level 1,
// and "Endure" will appear above your head as you use it.
605,Anodyne,Anodyne,11,2000,0,100,,,,,10477567,2,,,,,{ itemskill 8,1; },{}