This spell allows the creature touched to be able to act twice in any given round during the duration of the spell. This does not raise the characters speed or nothing along those lines; it just allow him to act twice during the round. They act once on their initiative and then once at the end of the round. This spell gives fighters an extra set of attacks at the end of the round or a mage another spell, etc. along with this the caster has to slow down and can only act on every other round(he effectively gives his round to the other character).
The material componet for this spell is a Quicklings ear.