How do you handle Wish?

[Darth Credence]

You can roll a d30 by rolling a d6 and a d10 at the same time.
die result of the d6 1,2: d10 roll is as it shows.
die result of the d6 3,4: add 10 to d10 roll result
die result of the d6 5,6: add 20 to d10 roll result.

Well, sure, but then you don't have a d30. I also have a d24 (looks like a cube with a squat pyramid on each face), a d14, a d7 (which is just a d14 with the numbers doubled up), a d16, and a big ol' d100 that is horrible. The d30 I at least remember using once upon a time. I use the d24, but that's because it represents the world's deities.