A spell for the permanent rune of a runesmith villain

[Shin Okada]

I am planning to use a Duergar Runesmith (Races of Stone) as a villain NPC. He meant to be Wizard 5/Fighter 1/Runesmith 5 and thus can cast up to 5th-level spell. Thus can have a permanent rune of a 4th or lower level spell.

Well, which spell shall I give him as a permanent rune? I have several thoughts,

1. Animate Dead ... now he does not need material components to create skeletons and zombies. Could be an excuse for him having a lot of undead creatures in his dungeon.
2. Alter Fortune (PHB2) ... now he does not need to spend 200 XPs per casting. May not have much impact as he is a NPC.
3. Dimension Door (or similar spell) ... now he can escape even when silenced.

More ideas?

 

[Dandu]

Silent Spell, or a metamagic rod of it, takes care of DD. Animate Dead is best left to Clerics, honestly. Alter Fortune isn't big enough for this.

What you need is an elegant spell from a more civilized age. What you need is a Thunderlance.