Iron Hero

Martial Feat (Prerequisite: Level 4+)

You have resolved yourself to save the day when all hope seems lost. You gain the following benefits:

+1 to your Constitution score, to a maximum of 20.

When you are attacked by a creature that has a CR higher than your level, you gain a +2 bonus to your Armor Class.

You have advantage on attack rolls against any creature that has reduced one of your allies to 0 hit points in the last round.

If a hostile creature you can see takes a legendary action, you can use your reaction to intercede, preventing the legendary action from happening. Once you use this ability, you can’t use it again until you finish a short or long rest.