Shield of Nature's Wrath

When a creature misses you with a melee attack, you can use your reaction to have your shield spike up and deal damage equal to 1 d4 + your constitution modifier.

Additionally, once per day, you can slam your shield into the ground and generate a half circle wall of stone that is 10 foot wide by 10 foot tall. The wall has 20 hit points and an an AC of 12.