An opponent plays a storm combo, ending in [Tendrils of Agony](https://gatherer.wizards.com/Pages/Card/Details.aspx?name=Tendrils%20of%20Agony). In response I play [Angel's Grace](http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=370545). After the storm of Tendrils finishes resolving, I am at -10 life, but I have not lost the game because of the Angel's Grace effect. If I take one point of damage (from something like [City of Brass](https://gatherer.wizards.com/Pages/Card/Details.aspx?name=City%20of%20Brass)).

**What will my resultant life total be?**