Spider Climb and Attacking?

[Ilium]

Have you ever eaten a spider? Maybe they're delicious!

(I can already hear my mom. "Just try one! They're really good for you! And actually really tasty!")

I never have, but I have eaten lobster. How different can it be?

 

[ThirdWizard]

I remember a wizard PC in my game who refused to cast this spell becuase he didn't want to eat a spider.

 

[Ycore Rixle]

I've been playing a warlock recently, and our group agrees with Ilium. Namely, you can cast while stuck on a wall, but not while actually climbing. Sort of like a monk can kick with his feet, but not while he's using them to run (unless he has Spring Attack, I guess!).