Use a simple mouseover/cast-on-cursor style macro if by “lights potential” you mean Light’s Potential on Shadow Priest in retail WoW. A common pattern for Shadow Priest macros is to pair the spell with #showtooltip and a conditional cast line, and retail Shadow Priest macro guides and forum discussions focus on the same kinds of mouseover, focus, and modifier setups.

Basic macro

Try this first:

lua

#showtooltip Light's Potential
/cast [@mouseover,help,nodead][@target,help,nodead][@player] Light's Potential

This will cast on your mouseover target first, then your current friendly target, and finally yourself if neither works.

If it is a proc or item use

If Light’s Potential is an effect, proc, or usable item rather than a normal spell, the command usually needs to be changed to /use instead of /cast:

lua

#showtooltip Light's Potential
/use [@mouseover,help,nodead][@target,help,nodead][@player] Light's Potential

That same general structure is used in current Shadow Priest macro collections for retail-style convenience macros.

Safer version for combat

If you want a version that avoids misfires, use a self-cast fallback only:

lua

#showtooltip Light's Potential
/cast [@mouseover,help,nodead] Light's Potential
/cast [@player] Light's Potential

That is a little more restrictive and can feel cleaner in PvE or PvP when you want consistent behavior.

How to set it up

  1. Open the in-game macro window.
  2. Create a new macro.
  3. Paste one of the snippets above.
  4. Drag it to your bar.
  5. Test it on a friendly target dummy or party frame mouseover.

Shadow Priest macro guides and player discussions consistently recommend testing mouseover and target fallback behavior before relying on a bind in live content.

Small note

If “Light’s Potential” is not the exact in-game name, the macro will fail, so copy the spell/item name exactly from the tooltip or spellbook. Retail macro resources for Shadow Priest are updated around current patch content, but the core macro syntax stays the same.

Would you like a version for PvP focus casting , mousewheel , or modifier key use?