In my white watermark program
Daylily (Hemerocallis 'Sweet Isabela') has proven to be the most pollen fertile but I wouldn't call it having magic pollen.
In my blue eye program
Daylily (Hemerocallis 'You Looking at Me') was my most pollen fertile setting pods on almost everything I put it on this year but I still wouldn't call it magic pollen. I just wish I would have used it a little more, there was only 1 or 2 days I used it this season and ended up with about 15 pods with it as a pollen parent. That's more pods than I got with Blue Jay tapestry as a pollen parent and I used it on hundreds of flowers this year.
The only flowers I have with "magic pollen" is Forestlake Ragamuffin and Forbidden Fantasy these 2 plants will set a pod on almost anything but are far from modern and my 1st gen Forestlake Ragamuffin kids have not been impressive even crossed with other toothies.
I'm looking forward to next year when I can try a few new ones that didn't bloom this year or didn't give me many flowers. Face Maker, Waves of Joy, Yoga Man, Venetian Pools, Stenciled Infusion, Into the blue, Tet Almira Buffalo Bone Jackson, and my tet RKF seedlings are some of the ones I'm most excited about trying next year. If anyone has any fertility notes on any of the ones listed I'd love to hear them.