[Fabric] Create custom potion effect without adding potion item?

I'm trying to create a potion effect called "Arcane fever" that I will interact with via datapack, And I can't seem to get it to work without also adding a "potion item"

I've added the "Potion Effect" with an "EffectStarted" Procedure,  but it doesn't show up in-game with the "/effect" command unless I also add a potion item. 

I could just ignore the items and leave it without a brewing recipe, only players in creative would ever know it exists... but that's bad practice, sloppy, and a waste of resources (Even tho they are trivial in this case)

What am I missing?