FOILCheapest priced copy (Guilds of Ravnica): $0.99 at Card Kingdom, near mint, their price list as of .
Mission Briefing 
Instant · Rare · Guilds of Ravnica Promos · #44s
Surveil 2, then choose an instant or sorcery card in your graveyard. You may cast it this turn. If that spell would be put into your graveyard, exile it instead. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.99 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 44 | Rare | $0.99 | $1.99 |
| Murders at Karlov Manor Commander | 110 | Rare | $0.99 | — |
| Guilds of Ravnica Promos | 44p | Rare | $1.49 | $2.99 |
| Guilds of Ravnica Promos | 44s | Rare | — | $2.79 |
6 rulings from Wizards of the Coast
- 5 October 2018The instant or sorcery card you choose may be one that you just surveilled into your graveyard.
- 5 October 2018If you cast a spell this way and that card is exiled, it's considered a new object in the zone it's put into. It won't be exiled if it's put into your graveyard later in the turn.
- 5 October 2018Mission Briefing is still on the stack while you choose an instant or sorcery card in your graveyard. Your Mission Briefing can't be to give yourself that same Mission Briefing.
- 5 October 2018Mission Briefing doesn't change when you can cast the chosen card. For example, if you choose a sorcery card, you can cast it only during your main phase when the stack is empty.
- 12 January 2024You perform the actions stated on a card in sequence. For some spells and abilities, you'll surveil last. For others, you'll surveil and then perform other actions.
- 12 January 2024When you surveil, you may put all the cards you look at back on top of your library, you may put all of those cards into your graveyard, or you may put some of those cards on top and the rest of them into your graveyard.