Invocation Grade: Lesser
Equivalent Spell Level: 4th
When you use this invocation, you gain remarkable resilience to any one energy type (acid, cold, electricity, fire, or sonic). For 24 hours, you gain resistance equal to your invocation caster level against the energy type of your choice. If you use this invocation a second time before the duration of the first expires, the new resistance and duration replace the old one.
Source: Dragon Magic, page 82.