Is it possible to make a character that no one would think is a caster?
The aim is to be as effective a caster as possible while making everyone think it's a badly optimised non-caster.
Because I don't want to be found out through any combination of detect magic and high spellcraft checks, every spell is going to have to have Disguise Spell Metamagic applied to it. This will also mean the DM will have to make up other sources for the effects other than my character as we go.
Every spell is also going to have no Somatic or Vocal component, as those would obviously give the game away. With Disguise Spell as well that's 2 or 3 Metamagics applied to almost every spell. That's going to be hard to keep up with, so I might want Versatile Spellcaster to stay relevant (Sorcerers get 1 level ahead instead of 1 level behind). Invisible Spell is at least free, but I'll be feat starved with all these Metamagics already.
I might need something for him to pretend to be doing while preparing spells.
And a way to recover spells if his sleep is interrupted, as most parties wake up non casters in response to night raids to avoid interrupting sleep.
I need something for him to be "trying" to do in fights other than, you know, fighting. If only Havoc Mage Battlecasting wasn't so terrible. It might be my only option though. Unless I go Unseen Seer Hunter's Eye Sneak Attack... (But as a Level 5 Spell... That'd suck a lot compared with Halt or Suggestion)
On the plus side he'll have no arcane spell failure for wearing armour. I just need to get him proficiency.
Dream Dwarf, Star Elf, Spirit Hellbred or Spellscale
Sorcerer 5, Unseen Seer 3, Havoc Mage 2, Dragonslayer 1, Havoc Mage 3, Paragnostic Apostle 5, 1 ?
Feats;
1 Versatile Spellcaster
1 (Flaw) Invisible Spell
1 (Flaw) Still Spell
3 Disguise Spell
5 {{Domain Access Oracle}}
6 Dodge
7 (Bonus) Silent Spell
9 Rapid Metamagic
10 (Otyugh Hole) Iron Will
12 Practiced Spellcaster (Sorcerer)
15 Magic Sensitive
18 ?
So it's basically a Sneak Attack Gish build that pretends to be a rubbish Rogue/Fighter build.
Anti-Magic Fields would be an issue I'd hate to contend with, but generally this character is an in-joke with the DM, as the other players are struck by the apparent stupidity and clumsiness of enemies.
So the things I'm lacking;
Ways to avoid suspicion;
Not needing sleep to regain spells, that sort of thing. I believe there's a magic bedroll for that from Magic of Faerun?
Is it possible to get a couple of fighter feats from items? (Other than a wand of heroism or whatever it's called)
Something for my character to "have to do" each morning that other players might believe? Maybe claim to be highly religious and let them think I need to do it for exalted or prestige reasons?
Anything else?
And I need help with my spell list.
Priority is given to spells that have only Somatic or Verbal components rather than both, but I also want to concentrate on spells that scale dependent on Caster Level to quite a degree, so that I won't mind casting a level 1 spell at level 3 or 4 quite so much.