As unusual as this may seem, it is perfectly scientifically accepted that lucid dreaming is real. Whether or not you have a spell that makes it more likely; most people have occasional lucid dreams when they are not trying to.
Keep in mind that lucid dreaming is when you know that you are dreaming.
There are scientific ways to increase the likelihood of having one, but I can't say for sure about the spell.
Check out the Lucidity Institute here
And their FAQ here
for more information. Keep in mind that while their facts are realistic, they are a company, technically.
As far as I am aware the only way to achieve or learn to lucid dream is practice. Practicing meditation will aide you in reaching trance states and will assist you in your overall goal. One cannot simply jump into lucid dreaming utilizing a spell. There are simple tricks some use to remind them they're awake during the day such as a symbol drawn on their hand which when seen can remind them they are awake, pinching themselves throughout the day, etc..., which some say can be experienced when you are dreaming existentially tricking your dreaming self into thinking you are awake transitioning you into a lucid dream state. I'm not sure if these tricks are actually helpful as it seems unlikely, but I would simply focus on practicing meditation.