Seeking Strike

You throw a weapon or fire a piece of ammunition and verbally declare a creature that you can see or have seen in the past minute. If the target is within the missile's range and there is a path wide enough for it to travel to the target, it flies toward the target, moving around corners. The target must make a Dexterity saving throw. On a failed save, it takes the missile's normal damage plus an extra 6d8 damage of the same type and you learn the target's location. On a successful save, the target takes half as much damage, you don't learn its location, and the missile stops and falls.