Get outta here!
Well it's swell to meet ya, your majesty! Call me Bill, Bill Cipher!

[A magical dimension-traveling combat-specialist princess. Good thing Star's under 17 a teenager, if she were an adult Bill would probably be putting the moves on her.]

Yeah, I'm not sure how but something's inhibiting our abilities here, and if your wand's not working, apparently certain magical items too! It might be this whole Gem thing, but...
Did you summon the wand out of your gem? If not, then it isn't only our personal powers being suppressed!