Cheapest priced copy (Doctor Who): $0.99 at Card Kingdom, near mint, their price list as of .
River Song's Diary 
Artifact — Book · Rare · Doctor Who · #182
Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves.
At the beginning of your upkeep, if there are four or more cards exiled with this artifact, choose one of them at random. You may cast it without paying its mana cost.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.99 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Doctor Who | 182 | Rare | $0.99 | $1.99 |
| Doctor Who | 460 | Rare | $3.99 | $2.49Out of stock |
| Doctor Who | 787 | Rare | — | $2.99 |
| Doctor Who | 1051 | Rare | — | $2.99 |
One ruling from Wizards of the Coast
- 13 October 2023You cast the spell as part of the resolution of the last ability. You can't wait and cast the spell at a later time.