Cheapest priced copy (World Championship Decks 2002): $0.59 at Card Kingdom, near mint, their price list as of .
Opposition 
Enchantment · Rare · Seventh Edition · #92
Tap an untapped creature you control: Tap target artifact, creature, or land.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
8 printings · $0.59 to $119.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Seventh Edition | 92 | Rare | $3.99 | — |
| Seventh Edition | 92★ | Rare | — | $84.99Out of stock |
| Dominaria Remastered | 62 | Rare | $2.29 | $2.49 |
| Dominaria Remastered | 290 | Rare | $1.99 | $2.99 |
| Amonkhet Invocations | 35 | Special | — | $34.99 |
| Urza's Destiny | 40 | Rare | $6.99 | $119.99 |
| World Championship Decks 2001 | ab92 | Rare | $1.99 | — |
| World Championship Decks 2002 | shh92 | Rare | $0.59 | — |
2 rulings from Wizards of the Coast
- 8 December 2022You can tap any untapped creature you control to activate Opposition’s ability, even one you haven’t controlled continuously since the beginning of your most recent turn.
- 8 December 2022Once a player announces that they’re casting a spell or activating an ability, no player may take other actions until the spell or ability has been paid for. Notably, other players can’t try to tap that player’s permanents to stop them from paying {T} or to stop them from producing enough mana.