This is Sheoldred, Whispering One but all colorless mana, which is, problematic
Is Poison Really That Bad
Poking around a bit, I found quite a few graded cards posted on eBay, and while sellers were asking higher-than-average prices for those cards, one thing seemed pretty obvious: The newer a Magic card is, the less likely grading it will have a significant effect on its value
Its a bit narrower than Make a Stand, only wanting to be in white creature-type matters decks like humans
While this will mostly be relevant in casual play, it's worth pointing out that if you have a Naban, Dean of Iteration on the battlefield, every Wizard that enters the battlefield will trigger Warstorm Surge, Fathom Mage, Angelic Chorus, and Purphoros, God of the Forge (among others) an additional time, which opens up an entirely different layer of deck-building potential that was missing with Panharmonicon, which only triggered abilities on artifacts and creatures
This means that these sleeves are durable and free of damaging chemicals that could corrode your cards