Quest Help! (Magic talent cutiemark)

[Stardust Glimmer 1]

I was working to get my cutie mark for talent, and I had learned the prickley and posey spell from thyme and then I accidently moved it out of my hotkeys and can't find it. Any Ideas to get the spell back?

[Howitzer]

If you open up your journal and open to the spells section, you can clock and drag those icons to your hotbar.