Needs review
Source: Lost Empires of Faerun

Description: You are learned in the arcane ways of Netheril, where masters of magic once molded and shaped arcane energy.

Prerequisites: Arcane Caster Level 1st

When you prepare spells, you can break down up to three existing arcane spell slots to create a specified number of lower-level spell slots. (A 0-level spell counts as 1/2 level for this purpose, so a 1st-level spell slot could be broken into two 0-level spell slots.) The sum of the levels of all the new spell slots must equal the level of the original. The number of spell slots you can create in this manner is otherwise unlimited. Spell slots that you break down into multiple lower-level slots remain that way until the next time you prepare spells, at which time you can choose to restore your spell slots to normal or break them up again.