Bumping up wthe wild die for a skill

[amerigoV]

Running a fantasy campaign. I wanted to make a simple item that bumps the Wild Die from d6 to d8 for a skill (say magical lock-picks that bumps thievery wild die). Is there [] code for that?

[Skellan]

[Thievery = 3wd]

[Skellan]

Or [Thievery +1wd]

[amerigoV]

Wonderful - thank you!