Charisma (32 PB): 20 Base+3 Age+5 Levels+5 Inherent+5 from a Wish +6 from Templates=44+2 effective for purpose of bonus spells= A +18 modifier, allowing for a single 18th level slot.
Doesn't work like that.
but only if they already have at least one spell slot of that level (such as from the Improved Spell Capacity feat).Also
Loredrake Steel Dragon 4 / Sorcerer 8
LA buyoff, age 4, CL = 11, ECL 12.
Cast River's Ravages, age 22 years to the age of 26.
You are now a Juvenile Steel Dragon.
+9 HD (dragon), grants +9d12 HP, +9 BAB, +4 all saves, (6+intmod)*8 skill points and increased maximum rank capacity in which every desired skills each time.
Also gain: +1 size, +6 str/int, +4 con, +2 wis/cha, +3d6 to breath damage, SR improves by 6 and gives a +10 bonus against 3rd level or lower spells, and finally gain 6 levels of spellcasting.
Note ~ makes on hell of a buff don't it?A.
With your new 8th level spell access cast Hasten The End and concentrate until you hit the Great Wyrm category. With your free feat slots & skill points take Epic Spellcasting and research an epic spell with a spellcraft check of 0 and cast it immediately by using Swift Concentration (gained via those free skill points). Subject to DM approval of course.
B.
Using Swift Concentration (gained via those free skill points) cast River's Ravages on your self again at your new caster level of 32 setting your new base age to 68 (Young Adult). Then do C to become an Adult.
C.
Bestow Curse and apply BoVD's age one category penalty. You are now an Young Adult Steel Dragon (as above but without hasten), among other things gain +2 to spellcasting. If you did B, you are an Adult Steel Dragon now.
Conclusion.
Either you have thousands of applied epic spell buffs (hasten) or turned into an Adult Steel Dragon at ECL 12, which into into self gives 19HD and +11 to spellcasting granting epic spell access anyway.
Don't forget to laugh every time you see someone post an LA/Rule ignoring kobold with a half dozen templates that fails to do what the OP brags about since you can produce superior results with literally no effort. Srly you can buy a Scroll of River's Ravages and use the acquired abilities finish the combo, all for 200gp. Yeahee epic spells by level 12 (or sooner if you cared to crunch cl bonuses)!