I'm wondering what are ways to get things like Disjunction, Greater Dispel, Disintegrate,etc.
Way to counter spells, and way to negate spells.
Assume for this that the characters are up to level 20, which the characters being a Factotum, PsiWar, Shadowcaster, Beguiler, and/or a Spelltheif.
All d&d books allowed, web material allowed, no Dungeon Magazine.
If there are prestige classes, or less than 5 level dips that could be that are not Tier 2, or Tier 1 please list, 1~3 level dips in Tier 1 or Tier 2 classes allowed.