Cheapest priced copy (The List): $1.79 at Card Kingdom, near mint, their price list as of .
Shadow Rift 
Instant · Common · Tempest · #86
Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)
Draw a card.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern