You have learned to deal additional damage while wearing spiked armor and have become more resilient in the process.

• Your constitution increases by 1, to a maximum of 20.
• While you are wearing spiked armor, you can use a bonus action to make one melee weapon attack with your armor spikes against a target within 5 feet of you. If the attack hits, the spikes deal piercing damage equal to 1d4 plus half of your level. You use your Strength modifier for the attack and damage rolls. Additionally, when you use the Attack action to grapple a creature, the target takes piercing damage if your grapple check succeeds equal to 3 plus half of your level. This damage continues each round while the creature is grappled.