Struggling with 'Disadvantage for certain types' coding

[WinterSoldier7]

I have the following ability I'm trying to create an effect for and struggling with...

As an action, you can force each creature you can see within 30 feet of you to make a Wisdom saving throw. Undead and fey creatures have disadvantage on the saving throw. On a failed save, the creature is frightened of you for 1 minute. The frightened creature can repeat this saving throw at the end of each of its turns, ending the effect on itself on a success.

I assume it's an IFT statement, but not sure where to start. Could anyone help?

(5e)

[LordEntrails]

It's probably something like this:

IFT TYPE (undead); DISSAV: wisdom
See https://fantasygroundsunity.atlassian.net/wiki/spaces/FGCP/pages/996642031/5E+Effects+for+Advanced+Automation#IF-and-IFT-Examples

[WinterSoldier7]

Thanks! I'll give that a try.

That link is super useful, though a might confusing. Will spend some time having a read-through and trying to get my head around it.