Blood Aegis

You cause the target's blood to take action to defend them even from within their own body, causing attacks to gain effect on them less often.

The target may add it's constitution modifier to it's AC while it isn't wearing armor. The target may be wielding a shield and still gain this effect.

This is a Sanguimancy Spell.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you increase the duration of the spell by 1 hour for each slot level above 3rd.