Took me a while to think about what I wanted to do here. I knew I wanted to do an Enchantment that was also something else, to follow on Theros' theme of stars being to do with enchantments. Then I went 'what if Sol Ring, but distant stars?'
Okay, there's already flavour text that implies Sol Ring uses starlight, but I don't care and I like my idea better than theirs. Theirs is dumb.
So Sol Ring but different. One, it's an Enchantment Artifact because stars. Two, It has suspend, because it's light is from far away. Yes, there's already a Sol Ring with suspend, so I had to make it even more different.
While the stars are distant, you can still see them and benefit from their light, so I reflected that in an ability that happens while suspended, which has been done before. Originally, than only happened while suspended, but I changed my mind later, making it take place also on the field. I had to take wording from Eminence abilities to get that right.
With this in mind, I still wanted it to be able to generate two mana. So tap ability for one mana, and to add a little 'stellar divination' flavour, scry 1 on a mana ability. Wooo! No stack no stack no stack!