Balancing spell slots of level greater than 9th

Question

Assume there is such amulet existing in the world:

• Wearer Wizard can cast 2 extra lvl 10 spells every day
• Wearer Wizard can cast 1 extra lvl 11 spell every day
• If you find spells of such level you could use them with such slots (I.E. Quest spells)
• If you don't find such spells you can anyway put metamagic spells inside that slots.

Am I allowed by 3.5 rules to have metamagic spells at those levels? (I.E. Am I Allowed to "Extend Time Stop" and put it on one of those slots?)

Answer 1

A 9th-level or lower spell modified by metamagic feats can be prepared in or cast using a 10th-level or higher spell slot of the appropriate level. Getting such higher-than-9th-level slots is the whole point of the epic feat Improved Spell Capacity (Dungeon Master's Guide 210), after all.

However, there are no published 10th-level or higher spells; those slots above 9th are exclusively for spells modified by metamagic. Further, as it sort of provides the benefits of three epic feats, I'd expect such an amulet to have a very high price!