Evasive Spirit (3.5e Invocation)

When you use this invocation, you must choose either Evasion or Mettle. For the next 24 hours you have that ability. You may stack this with another ability that gives Evasion or Mettle to get the improved form. If you reinvoke this invocation, you lose the Evasion or Mettle ability given by the prior invoking of Evasive Spirit.

Mettle: If subject to a spell with Will or Fortitude save Partial, and the save is made, the creature negates the partial affect of the spell. This also applies to beneficial effects.

Evasion: See Evasion and Improved Evasion