At-will, std, ranged, concentration, 2 Vitae; you grant a subject immunity to a single spell of your choice that affects them. The spell must be one that they could normally be affected by, that you are aware of (either one on your list, or one you've seen before).

At rank 3, you can add +1 Vitae to grant immunity to one additional spell, or add +1 Vitae to grant immunity to an additional target.

At rank 4, you can select an entire school of magic instead of individual spells, at a cost of 4 Vitae.