I also play Library of Leng in my Nekusar, the Mindrazer deck, but I find it's really well suited for a deck that has a lot of discard effects or wheels (discard and draw) that target myself as well as the table
I understand that you need to run four colors to pull this off, and Im not sure if Standard has either the manabase or the cantrips to try to move in on that approach, but Modern should easily have all the necessary tools available (not really considering it for Legacy as combo decks have a much higher bar to climb there, what with Tendrils of Agony and Show and Tell alive and kicking)
Destiny Spinner To maximize Destiny Spinners land animation, you need to play it in a deck filled with enchantments
A $79.99 fee per card makes submissions on anything under a certain threshold hard to justify
I get the frustration players have if they have to spend extra money on external products to keep Magic cards from expensive collector boosters in good shape that come straight out of the package, but in the meantime, I hope this guide was helpful
Bearing this in mind, the prices that appear for the cards on this list are their prices in January of 2021 according to their listings on Scryfall.com