Changes were made to Overload and Desperate power, the rest is the same.
Changes From the Orrigonal Ryze
Base stats: Base movement speed lowered from 340 to 330 to compensate for overloads change.
Overload: I changed the cooldown reduction for a different passive. Ryze now gains movement speed each time he casts a spell.
Rune Prison: No change
Spell Flux: No change
Desperate power: No longer gives Spell Vamp or splash damage. Grants less movement speed (50 from 80). Additionally, whenever Ryze casts a spell, his other cooldowns are reduced by a percentage of the cooldown of the spell cast.
Example: Ryze is level 18, has built no cooldown reduction and casts Desperate power. He then casts Rune Prison, reducing the cooldown of R by 8 seconds (1 from arcane mastery, and 7 from 50% of rune prison) He then casts Spell Flux, Reducing the cooldown of Desperate power and rune prison by 8 (1 from arcane mastery, and 7 from 50% of rune prison). Desperate power now has a cooldown of 84, Rune Prison has a cooldown of 6 and Spell Flux has a cooldown of 14.
This combo would have been better using Overload inbetween each spell, but this was just an example.
Use this link to make your own custom champion concepts: http://leagueoflegends.wikia.com/wiki/Special:CreateBlogPage?preload=User_blog:Mineko_Charat_Lucky/Behold,_a_Sandwich