Your familiar continues to advance in power and can use minor shadow magic.

Prerequisite(s): Arcane bond (familiar) class feature, 2nd-level shadowdancer

Benefit: Every two levels of shadowdancer you possess count as a level of a class which improves the abilities of your familiar. For example, a wizard 6/shadowdancer 4 counts as having 8 levels of wizard for purposes of calculating the familiar's abilities. Additionally, your familiar is able to use any one of the following magical effects once per day: radiate darkness from itself to a radius of 20 feet (as the darkness spell); gain a +4 bonus to Stealth for 1 minute per level of shadowdancer you possess; or become invisible (as invisibility) for 1 round per level of shadowdancer you possess. The familiar's caster level for these effects is equal to your shadowdancer level.