The Intelligent Sentinel is a unique type of Undead guarding the secret shrine to Shar underneath statue of Ketheric Thorm in Reithwin Town's square. Its abilities mirror that of a Wizard, and fitting of its role it has very high Intelligence.
Shoot a green arrow that bursts in a spray of acid. Deals 4d4Acid damage immediately and 2d4Acid damage at the end of the target's next turn.
If the spell misses, the target still takes half the initial damage, but no damage at the end of its next turn.