Edge of Eternities releases on August 1st
First you have Skullclamp, an all-star staple of every aristocrat deck that benefits from sacrificing tokens since they usually only have 1 toughness
They're mechanically identical to the indicated card, meaning you can only play four of them (or one in Commander) in your deck
Mmmenon, the Right Hand Fair Urza, Lord High Artificer is how Im reading Mm'menon, the Right Hand
The more fetches you crack, the bigger your Knight becomes, and it'll be a force very quickly
Nashi, Searcher in the Dark An evasive 2-drop that gets bigger and fills the graveyard, Nashi, Searcher in the Dark from Duskmourn: House of Horror plays like a powered-down Psychic Frog, which has been more than viable in its home formats of Modern and Legacy