*** (3 vipers out of 5)
Prophetic warning arrives in the person of a defrocked Bajoran Vedek named Yarka, identical cousin of Daniel Jackson's father-in-law from Stargate. (I love Erick Avari: all across the multi-verse his job is to pop out of a library or museum and intone "DIRE PORTENTS SHALL ENTOMB THE FAITHLESS!")
Today he's in a snit about a 3000-year-old text that features the Emissary (Sisko) and also three vipers that threaten the Celestial Temple (wormhole) and possibly something about a sword of stars except I nodded off for a moment there. But we're VERY clear about the three vipers! Dodge the vipers, I say!
You've heard of dilithium and trilithium, now here's a whole comet full of si-lithium. Or perhaps Sy Lithium, a battery salesman from Jersey City? Can Sisko and Kira find common ground between science and nonsense, uh, religion... in time to prevent this dirty snowball from getting all over their nice, clean Celestial Temple?
"Destiny" is standard fare, most notable as far as I'm concerned for a couple of Ferengi Rules of Acquisition that explain a lot about their financial stability through the centuries. #34: War is Good for Business, and #35: Peace is Good for Business.