The creature can use a spell-like ability to maximum effect.
Benefit: Choose one of the creature’s spell-like abilities, subject to the restrictions below. The creature can use that ability as a maximized spell-like ability three times per day (or less, if the ability normally usable only once or twice per day). When a creature uses a maximized spell-like ability, all variable, numeric effects of the spell-like ability are increased to their maximum effect. A maximized spell-like ability deals maximum damage, cures maximum hit points, affects maximum targets, and so on as appropriate. For example, a hellstoker devil’s burning hands deals 20 points of damage (5d4 maximized). Saving throws and opposed rolls (such as the one made when a character casts dispel magic) 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 –3.
For a summary, see table below.
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.
Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games.