OGC:Suppress Spell Energy (3.5e Feat)
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Suppress Spell Energy [Metamagic, Class, Magical, Arcane, Divine]
You have learned to minimize the mystical disruption caused when a spell is cast, making it difficult for others to detect your spells.
Benefit: For purposes of detect magic, detect magical residue, and detect mystical streams, the aura strength of any spell that you cast is reduced by one category; if you cast a 4th-level spell, the aura will be faint instead of moderate, for example. In addition, the DC of any Spellcraft check to analyze or identify your spell is increased by 5. This is an innate ability and does not require the caster to use a higher-level spell slot for a spell. However, if the caster chooses to use a spell slot one level higher than the spell’s actual level, the spell’s aura is instead reduced by two categories (to a minimum level of dim) instead of one and the DC of any Spellcraft check is increased by a total of 10.