Ideas for a bit of a homebrewed dragon disciple past lvl 10

[CrispyKingPin]

So my character is immortal, and I wanted to hear some interesting ideas for becoming a true dragon. Like getting it's age abilities and stuff.
I'm a void dragon for my dragon type. I'm bloodrager/6 at the moment, and planning on taking at least 9 lvl's in dragon disciple to get the wings. however if anyone had some neat ideas I might take it past that. I get all the bloodrager bloodline feats for this prestige, and i'm essentially becoming a monster for my str and con stats. But I was wondering if anyone had some neat ideas for extra lvl's in the prestige to become like a ancient dragon eventually when we hit like epic lvl's.

[Eldonauran]

Hmm, easy stuff first:

Spellcasting +1 at levels 11, 12, 14, and 15.
Form of the Dragon III at level 13, 3/day.
Another ability bonus somewhere in there, probably a +2 CHA.
Bonus bloodline feat at 11 and 14
Natural armor increase 11 and 15
Blindsense 90ft at level 15

That would probably be enough right there. Form of the Dragon III is an 8th level spell, makes you a huge dragon and gives you unlimited uses of their breath weapon.