Charm

Lesser Invocation; 4th
You can beguile a creature within 60 feet. The creature must succeed on a Will save or instantly come to regard you as its comrade. This is a language-dependent ability. Other than these differences, this ability works as the charm monster spell. You can never have more than one target charmed at a time with this ability. If a second creature is charmed, you lose your hold on the first creature.

Source: Complete Arcane