Quote Originally Posted by Answerer View Post
A common fallacy, but the thing is this: Wizard spells are incredible. Many of them are good in every encounter. People tend to mention the same spells a lot, not hunting down the obscure perfect spell. People mention grease and glitterdust because they are great things to always prepare. Etc.

Also, acid arrow's not the best way through the Tarrasque for a 7th-level Wizard, summon undead IV is. While the average Wizard is not going to prepare that on a given day, for a task as monumental as the Tarrasque, I think a day's preparation is appropriate (keeping oneself safe from the grounded Tarrasque is trivial with a Wizard's usual load-out). Anyway, summon a bunch of allips (or use command undead or Rebuke Undead on some if you can find them normally), and have them touch the Tarrasque. It is not immune to ability drain, its Touch AC is 5, and its Wisdom is 14: Allips will tear through that in short order. Since they're incorporeal, the Tarrasque cannot touch them, and as an Int-3 incarnation of rage and destruction, retreat would be grossly out of character for it. Then it's just a matter of securing a wish (yay Candle of Invocation) to finish it off.

The CR 3 Allip is vastly scarier and more dangerous than the CR 20 Tarrasque. It's kind of 3.5 in a microcosm: the Allip is magical, with its touch attacks, incorporeality, and ability drain. The Tarrasque is the biggest brute in the game, and it's trivially downed by the Allip.
This... is beautiful.