Editing Tarrasque (section)

===(3.5) How to Kill A Tarrasque in 17 Easy Levels (or 1, if you are wealthy)===
Start off as a Cleric or Wizard. Add whatever full spellcaster PrC's you want/qualify for. Reach 17th level.

Key Equipment:
*Holy Symbol (Cleric) or Spellbook (Wizard). If you're a Wizard, you'll need to have learned the Gate spell.
*Some method of flying for around 10 rounds or so (yes, you can use a spell if you have a suitable one). Or just be able to run quickly.

Method:

Stand (or fly) far enough away from the Tarrasque so that it can't attack you.
Cast Gate, to Call an Angel (Solar). You should be able to get one with at least 34 HD.
Have the Solar attack the Tarrasque with Slaying arrows. Be ready to hit the Tarrasque with ongoing damage once it goes down, but stay out of melee range of it.
Use the Solar's Wish (Spell Like ability) to kill it. If that fails, have the Solar cast Miracle (one of its standard spells).

Note: Anyone with 8,400 gp (including a wealthy 1st level Commoner) can also accomplish this by using a Good aligned Candle of Invocation.