From the SRD:
EMPOWER SPELL-LIKE ABILITY [GENERAL]
Prerequisite: Spell-like ability at caster level 6th or higher.
Benefit: Choose one of the creature’s spell-like abilities, subject to the restrictions below. The creature can use that ability as an empowered spell-like ability three times per day (or less, if the ability is normally usable only once or twice per day).
When a creature uses an empowered spell-like ability, all variable, numeric effects of the spell-like ability are increased by one half. Saving throws and opposed rolls are not affected. Spell-like abilities without random variables are not affected.
The creature can only select a spell-like ability duplicating a spell with a level less than or equal to half its caster level (round down) –2. For a summary, see the table in the description of the Quicken Spell-Like Ability feat.
Special: This feat can be taken multiple times. Each time it is taken, the creature can apply it to a different one of its spell-like abilities.
QUICKEN SPELL-LIKE ABILITY [GENERAL]
Prerequisite: Spell-like ability at caster level 10th or higher.
Benefit: Choose one of the creature’s spell-like abilities, subject to the restrictions described below. The creature can use that ability as a quickened spell-like ability three times per day (or less, if the ability is normally usable only once or twice per day).
Using a quickened spell-like ability is a free action that does not provoke an attack of opportunity. The creature can perform another action—including the use of another spell-like ability—in the same round that it uses a quickened spell-like ability. The creature may use only one quickened spell-like ability per round.
The creature can only select a spell-like ability duplicating a spell with a level less than or equal to half its caster level (round down) –4. For a summary, see the table below.
In addition, a spell-like ability that duplicates a spell with a casting time greater than 1 full round cannot be quickened.
Normal: Normally the use of a spell-like ability requires a standard action and provokes an attack of opportunity unless noted otherwise.
Special: This feat can be taken multiple times. Each time it is taken, the creature can apply it to a different one of its spell-like abilities.
Code:
Spell Caster Caster
Level Lvl to Lvl to
Empower Quicken
0 4th 8th
1st 6th 10th
2nd 8th 12th
3rd 10th 14th
4th 12th 16th
5th 14th 18th
6th 16th 20th
7th 18th —
8th 20th —
9th — —
