Arcane Smite

9th level-Level Artificer, Forgewright Feature

You can channel raw arcane power through your Armament.
Beginning at 9th level, when you hit a target with your Arcane Armament you can channel arcane energy through it to create one of the following effects of your choice:

The target takes an extra 2d6 force damage. You can expend a spell slot to increase this damage. The damage increases by 1d6 per level of the spell slot you expend.
You gain temporary hit points equal to your artificer level.
You can force the target to make a Strength saving throw. On a failed save they are knocked prone.

You can use this ability a number of times equal to your Intelligence modifier (minimum of once), and you regain all expended uses when you finish a long rest.