Cheapest priced copy (Legends): $14.99 at Card Kingdom, near mint, their price list as of .
Rapid Fire 
Instant · Rare · Legends · #32
Cast this spell only before blockers are declared.
Target creature gains first strike until end of turn. If it doesn't have rampage, that creature gains rampage 2 until end of turn. (Whenever the creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Legends | 32 | Rare | $14.99 | — |
One ruling from Wizards of the Coast
- 20 September 2013If a turn has multiple combat phases, Rapid Fire can only be cast before the beginning of the Declare Blockers Step of the first combat phase in that turn.