I can not cite the source, or even solid fact -- just a fleeting memory in the back of my head that in one of the interviews, one of the designers said that even though there are 30 levels of spells, it doesn't mean that all 30 levels will have a full spell selection.
My guess, based on that (whether it is correct or not), is that the 4e-equivalent to metamagic will allow spells to take spell slots other than their own level. Kind of like how, in 3e, you could have a 10th level spell slot and so on even though there were no 10th level spells.
All this based on guesses made by something I only vaguely recall.

My guess, based on that (whether it is correct or not), is that the 4e-equivalent to metamagic will allow spells to take spell slots other than their own level. Kind of like how, in 3e, you could have a 10th level spell slot and so on even though there were no 10th level spells.
All this based on guesses made by something I only vaguely recall.
