30th Anniversary Edition

Instill Energy

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.

Masters Edition IV

Enchant creature
Enchanted creature has haste.
{0}: Untap enchanted creature. Activate this ability only during your turn and only once each turn.

Fifth Edition

Enchanted creature is unaffected by summoning sickness.
o0: Untap enchanted creature. Use this ability only during your turn and only once each turn.

Fourth Edition Foreign Black Border

Fourth Edition

Target creature can attack the turn it comes into play on your side.
o0: During your turn, untap target creature Instill Energy enchants. Use this ability only once each turn.

Summer Magic / Edgar

Foreign Black Border

Revised Edition

You may untap target creature one additional time during your turn. Target creature may also attack the turn it comes into play.

Intl. Collectors' Edition

Collectors' Edition

Unlimited Edition

You may untap target creature both during your untap phase and one additional time during your turn. Target creature may attack the turn it comes into play.