To me!

Instant Guardian Reaction Feat 10

Animist Bard Champion Cleric Druid Magus Oracle Ranger Sorcerer Summoner Thaumaturge Witch Wizard
Frequency: once per day
Trigger You are the target of the attack

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Protect Me! When you are the target of an attack, you can choose to cast a spell with the summoning descriptor that is at least 2 ranks lower than the highest-rank spell slot you have. You stride once and summon the creature into the space you vacated. That creature is now the target of the attack.

Thoughts?