Giant-kin Feats

Arcane Imbued

Prerequisite: Firbolg Your abilities with the arcane has been imbued into your very being. You gain the following benefits: Increase your Intelligence or Wisdom score by 1, to a maximum of 20. You can cast the Detect Magic spell at will. You gain proficiency with the Arcana skill. Whenever a creature affects you with a spell of 2nd level or lower, you are charged with a copy of that spell. Once within the next hour you can use your bonus action to cast that spell, using your Wisdom as the spellcasting ability modifier. This ability can be used once per long rest.

Fortress of Muscles

Prerequisite: Goliath From your biceps to your calves, the tips of your toes to the tip of your skull, you are a powerhouse lined with muscles. You gain the following benefits: Increase your Strength score by 1, to a maximum of 20. You can headbutt enemies with your particularly thick skull. This is an unarmed strike attack that deals 1d6 + your Strength modifier. After you use Stone's Endurance, on your next turn you can make an unarmed strike against an enemy as a bonus action. As a reaction to being critically hit, you can use stone’s endurance without expending a use of stone's endurance.

Living Monolith

Prerequisite: Firbolg You have learned to use your massive size to the benefit of your allies, and enhance your own size to further increase your abilities. You gain the following benefits: Increase your Constitution score by 1, to a maximum of 20. You provide enough concealment so that allies within 5 feet your size or smaller can attempt to Hide from enemies. At the start of your turn, you can magically increase your size to one larger than normal for a number of rounds equal to your Constitution modifier plus 1 (minimum of 2) as though under the effects of the Enlarge spell, but it does not require concentration. You gain resistance to slashing, piercing and bludgeoning damage while in this form. You regain the use of this ability after a long rest.