Cheapest priced copy (Revised Edition): $1.29 at Card Kingdom, near mint, their price list as of .
Instill Energy 
Enchantment — Aura · Uncommon · Fourth Edition Foreign Black Border · #252
Enchant creature
Enchanted creature can attack as though it had haste.
{0}: Untap enchanted creature. Activate only during your turn and only once each turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
13 printings · $1.29 to $119.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Unlimited Edition | 203 | Uncommon | $6.49 | — |
| 30th Anniversary Edition | 198 | Uncommon | $9.99 | — |
| 30th Anniversary Edition | 495 | Uncommon | $42.99 | — |
| Revised Edition | 203 | Uncommon | $1.29 | — |
| Fourth Edition Foreign Black Border | 252 | Uncommon | — | — |
| Fourth Edition | 252 | Uncommon | $1.49 | — |
| Fifth Edition | 304 | Uncommon | $2.49 | — |
| Collectors' Edition | 203 | Uncommon | $6.99 | — |
| Intl. Collectors' Edition | 203 | Uncommon | $6.49 | — |
| Foreign Black Border | 203 | Uncommon | — | — |
| Limited Edition Alpha | 202 | Uncommon | $119.99 | — |
| Limited Edition Beta | 203 | Uncommon | $64.99 | — |
| Summer Magic / Edgar | 203 | Uncommon | — | — |
3 rulings from Wizards of the Coast
- 4 October 2004Instill Energy's untap ability will not untap the creature until it resolves. This means other spells and abilities can be used before it actually becomes untapped.
- 4 October 2004If attached to an opponent's creature, you can untap their creature during your turn.
- 1 August 2005Any Auras (or other effects) which are on the creature that would cause it to not be untapped (or have a cost to be untapped) during untap step do not in any way hinder or imply a cost to use this card's ability to untap once during the turn.