Vanquisher's Banner provides pretty much all you want from a support artifact: an anthem effect lord effect and a very solid draw engine to go along with it
Collectors prize this card not for raw power, but for what it represents
Enter King The Luck, a YouTuber who set out on a quest to discover the most damage possible in each generation
On the other hand, seeing effects go from common to uncommon (like Doom Blade) is much more controversial, and while almost unheard of, having effects go from common to rare feels horrible because players end up thinking, "Only a few sets ago, I opened this card as a common, and now it's eating up the rare slot where I'm supposed to get an exciting / powerful / playable card?" This psychological feel-bad sums up the biggest problem with the aftermath cards: they simply aren't exciting because nearly all of them feel like commons that you'll open in your rare slot
Main Phase You can play cards, and attack with your Leader or Characters
Her -4 is a little more situational, but it makes sure that if youre behind, youre going to be able to change that in a hurry and she still holds on with 1 loyalty if you use it right away