Guardian

Guardian, Basic

Is given out by DM when gaining your first non-spellcasting level.

As a bonus action you can enter a Guarding Stance. Until your next turn any melee attack against an ally within melee reach of you have disadvantage. Any ally within 5 ft of you have half cover. If you wear a shield this cover is increased to three-quarters cover.

Guardian, Advanced

Is given out by DM when gaining your 7th non-spellasting level while having the Guardian, Basic feat.

You have learnt to protect your allies from certain area Effects, such as a red dragon's fiery breath or an Ice Storm spell. When you and allies within 5 ft of you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, can you use your reaction to throw yourself in harms way. You make the saving throw with disadvantage, willingly standing in the effects way while trying to do so in a way that wont harm you to badly. Choose a number of creatures, up to your proficiency modifier, that are within 5 ft of you, or behind you from the effects point of origin. Those creatures make the saving throw with advantage. Additionally, if they roll a natural 20 on the savign throw they take no damage at all. If you roll a natural 1 you take half double damage from the effect.

Guardian, Expert

Is given out by DM when gaining your 13th non-spellasting level while having the Guardian, Advanced feat.

You can take up to 3 reactions per turn as long as they all are opportunity attacks.