This spell enables one creature no larger than yourself to balance on a glove covering your forearm and briefly gain the ability to make a devastating flying charge once it leaps off. While the target may take no action while perched on your arm in this way, it is effectively weightless from your perspective and has no impact on your encumbrance or speed. However, this does fully engage your arm, meaning you cannot use it for any other purpose. The glove, similar in appearance to what falconers wear when taking raptors hunting, provides extraordinary stability to the target, allowing it to maintain its balance under even the most extreme conditions unless it chooses to step off or you stop concentrating on the spell.
When the target leaves your arm it gains the ability to fly for one round at three times its base land speed or twice its fly speed (whichever is greater). During that round, the creature may also chose to make a special flying charge. This allows it to make a full attack and grants it an additional +2 bonus on its attack rolls. In addition, any successful attack it makes as part of this charge automatically scores a critical threat (but the target must still make a confirmation roll as normal).