The defining feature which distinguishes creatures from objects is that they have a Wisdom score. In other words, a creature Exists if and only if its Wisdom Score Exists. An object without a Wisdom score can exist, but it cannot Exist. So if you use Smite existence on a door, you deal extra damage, but if you use Smite Existence on a door, you deal no damage.
I'm curious as to whyI'd like to put in a friendly request to not use PEACH on jokes.
In any case, SMITE EXISTENCE!
Actually, I think this alignment system needs a second axis. In addition to Existence v.s Nonexistence, how about you can be either Pretzel or NonPancake. However, NonPretzel and Pancake are forbidden.