Cheapest priced copy (Legends): $74.99 at Card Kingdom, near mint, their price list as of .
Disharmony 
Instant · Rare · Legends · #142
Cast this spell only during combat before blockers are declared.
Untap target attacking creature and remove it from combat. Gain control of that creature until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $74.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Legends | 142 | Rare | $74.99 | — |
6 rulings from Wizards of the Coast
- 4 October 2004Disharmony works even if the attacker was not tapped to attack.
- 4 October 2004The creature untaps (if it was tapped) before you get control of it.
- 1 October 2008Disharmony can target a creature you control.
- 1 October 2008The current wording explicitly removes the creature from combat. It is no longer an attacking or blocking creature.
- 1 October 2009If you cast Disharmony during an opponent’s turn, you may then block with the creature you gain control of (assuming there’s an attacking creature it can block).
- 20 September 2013If a turn has multiple combat phases, this spell can be cast during any of them as long as it’s before the beginning of that phase’s Declare Blockers Step.