Guardian

You design your armor to be in the front line of conflict. It has the following features:

You can discharge concussive blasts with strikes from your armor. The pulse counts as a Simple Melee weapon and deals 1d8 Thunder damage on a hit. A creature hit by the pulse has Disadvantage on attack rolls against targets other than you until the start of your next turn.

While Bloodied, you can take a Bonus Action to gain Temporary Hit Points equal to your Artificer level. You lose these Temporary Hit Points if you doff the armor.