Bulwark

When you wield a shield, every haphazard blow is turned aside, and even strikes aimed at your allies cannot easily penetrate your defence. You gain the following benefits:

Stand behind me. As a reaction when you or any ally within 5 feet are attacked, you may enter a defensive stance until the start of your next turn. You and every ally within 5 feet of you are granted the benefits of half-cover while this stance is active. Any forced movement breaks this stance. On your first turn after using this reaction, your Speed is halved.

Steel rimmed. Once per turn, you may reduce any damage you take that is not psychic damage by 1d4, as long as you can see the attack, are not surprised, and are able to take actions as normal. If your shield grants additional AC, add the bonus to the reduction from this feature.

Solid as the mountain. While wielding a shield, any forced movement you suffer is reduced by 10 feet.