It's worth a quick browse if you're keen to boost your collection for less
The value of X is determined as Dai Li Agents's second ability resolves, not when it is put on the stack
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)
It also sees competitive play in Modern, and sometimes shows up in Legacy
I've always felt that the Jeskai Khan was a bit lacking in commanders, but now if we team up Azorius Ishai, Ojutai Dragonspeaker with Izzet Kraum, Ludevic's Opus, we put our opponents in a very interesting predicament