Earthen Chains (3.5e Spell)
From D&D Wiki
|Enchantment [Chain Spell]|
|Casting time:||1 standard action|
|Range:||Short (25 ft. +5 ft. per 2 caster levels)|
The target gains a +2 insight bonus to attack rolls for each level at which this spell was cast.
So if this spell was cast as a level 5 spell, they get +10 to attack rolls.