This legendary human artificer puts your opponents in a tough spot because Urza and the token are often massive threats for different reasons, which makes picking the target to kill tricky
Anguished Unmaking Destroying a threat is good, but exiling a target is better: Those pesky death triggers won't trigger (because exiling ain't dying!), and most decks have no way to profit from exiled cards (unlike cards in the graveyard, which some decks are thrilled to have)
Jecht, Reluctant Guardian // Braska's Final Aeon - Final Fantasy (Near Mint) You want to be informed when the price of Jecht, Reluctant Guardian // Braska's Final Aeon - Final Fantasy (Near Mint) reaches a certain value
Morbid Opportunist stands out as one of the few that trigger when tokens die, so its useful in the right context
The Fourth Sphere Plane - Phyrexia At the beginning of your upkeep, sacrifice a nonblack creature