Damage equals that of a normal creature of that type. The abilities are cumulative. The familiar's Intelligence score. The presence of the familiar sharpens its master's senses. While the familiar is within arm's reach, the master gains Alertness.
Improved evasion is an extraordinary ability.
The familiar must be within 5 feet at the time. If the spell has a duration other than instantaneous, the spell stops affecting the familiar if it moves farther than 5 feet away. The spell's effect will not be restored even if the familiar returns to the master before the duration would otherwise have ended. The master and familiar can share spells even if the spells normally do not affect creatures of the familiar's type. The master cannot see through the familiar's eyes, but the two of them can communicate telepathically.