So we thought about this to varying degrees.
Umi is flat out against it.

For me, if I did this, it would be:
You have to be a hero who never used your familiar and <cost> and <hours requirement> and.....

And I realized that it goes way away from what you're wishing for to the point of where I'm really basically just coaling it anyway.

So for straight up simplicity, this one is a coal.