[3.5] The Stuffy Doll Vs the Playground (V.1 ~ V.28)

[Telonius]

You're a Theurge with access to dual 9's (select your 2 spell list). You are faced with a creature that has infinite Spell Resistance and automatically succeeds on all saving throws (other then this it is vulnerable). In 2 rounds it will immediately kill you. How do you kill it first using your spells/powers?

Note: All variables make this creature have infinite SR and cannot fail a Saving Throw. The creature will continue killing you, if you manage to revive yourself and will kill you no matter where you are in the Multiverse.

V.5: Creature has Undead (Incorporeal) creature type, 1 billion HP, 84 million HD, 1 str, 1 dex, - con, - int, 1 wis, 1 cha, DR 15/-, Fire, Cold, Lightning, Acid & Sonic Resistance 20, Regeneration (takes normal damage from magic).

Crit it with a Ghost Touch Heavenly Burst Weapon (BoED). It won't take extra damage from the crit, but the burst property will activate, dealing it 1d2Str damage (no save).

EDIT: Oil of Bless Weapon will confirm a critical hit. Trying to track down the source of this, but apparently there's something called a "Wasp Bounty Hunter" prestige class from Rokugan that lets an archer take 20 on an attack if he uses a full-round action. (This may be mythical or homebrew, will update this if I find out anything else).