Mass Effect 5e - Player's Handbook

Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

After reducing an enemy to 0 hit points with a melee attack, you may take another Action this turn.

In battle, you can throw yourself into a vicious feeding frenzy. As a bonus action, you can make a special attack with your bite. If the attack hits, it deals its normal damage, and you automatically activate Bloodlust. You can't use this trait again until you finish a short or long rest.

You are immune to disease. In addition, you have resistance against poison damage and advantage on saving throws would cause you to become poisoned.

You regain all your your Hit Dice on a long rest. Additionally, if you lose a body part, the missing part will regrow and return to full functionality after a passing of time based on the body part: