Cheapest priced copy (Nemesis): $0.35 at Card Kingdom, near mint, their price list as of .
Off Balance 
Instant · Common · Nemesis · #15
Target creature can't attack or block this turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Nemesis | 15 | Common | $0.35 | $1.99Out of stock |
One ruling from Wizards of the Coast
- 4 October 2004The ability only does something if used before attackers or blockers (as appropriate) are declared during a turn. If used after the creature is declared as an attacker or blocker, nothing happens.