Especially with a d20, the Target changing just a little is more of a mental thing for the players. So long as you pick a good number you are comfortable with, the natural swing of the d20 will be plenty of variety I think.
Especially with a d20, the Target changing just a little is more of a mental thing for the players. So long as you pick a good number you are comfortable with, the natural swing of the d20 will be plenty of variety I think.