Remember when we said that Grim Flayer was the epitome of serial killer Human tropes in Magic: The Gathering
The body isn't super exciting but gets a surprising amount of work done with the swampwalk - try and grab a Urborg, Tomb of Yawgmoth if you expect to run Sheoldred
Its a creature that can also be blocked with impunity by opponents, setting you back three mana if you want to recast it
This version of Ezur is fairly mana intensive to get your double proliferation activation, requiring you to pay three mana on top of the four required to cast it
Now while it is certainly true that Wizards of the Coasts commitment to maintaining the Reserved List makes almost anything on the list a safe bet long term, I have been pretty vocal on Twitter with suggestions that there are better targets in abundance for the short and mid term
Sorcery speed is not its only problem though Portable Hole stays on the battlefield, so it can be destroyed later on