Umbreon ex sells for around 802, followed by Sylveon ex (253), Espeon ex (213), Leafeon ex (199), and Vaporeon ex (175)
This is why Strixhaven has some spells that copy themselves under certain conditions
While there are other cards like Lingering Souls that create similar tokens but also provide additional value by being flashbackable, Shadow Summoning can still see play in the right context, especially in formats where instant-speed token generation is less critical
You can also find this deck on Moxfield anduse it as a base to edit if you wish to make changes
9 Mentor of the Meek Now at uncommon rarity
I initially didnt put Colossus Hammer in my top 5 because its only really played in 1 deck, but considering the format share and winning Hammer had in the past, I can see it being in the top 5 as well