Captain America

Bounce Chain

When reaching 15th level, your shield no longer falls to the ground when hitting another target and is treated the same as the 1st target when it comes to bouncing rules (You can only bounce a shield off a wall or solid surface once, and Knocking a Target prone ends the chain). 

Spell Reflection

When reaching 18th, your shield can stop Evocation Spells from hitting you and can be aimed at a target like you were the person casting the spell, to get hit with the spell that you were the target of (does not work with Fireball, Delayed Fireball, or Magic Missile).

Shield Master

When reaching 3rd level, you become a expert at using the shield:

• When attacking with the shield it deals 1d6 Slashing damage and reaches 2d6 at level 6, 3d6 at level 12, and 4d6 at level 18.
• Gains the Shield Master Feat
• Donning a Shield costs a reaction before being attacked by a creature (unless it is a Surprise Attack or Sneak Attack) or a free action during your turn.

Shield Thrower

When reaching 7th level, you can throw your shield up to 30 feet or up to 60 feet (With Disadvantage) towards a target. You can choose to return the shield to your hand or to knock the target prone, with the shield being set within 5 feet of the target.