Goliath are medium-sized humanoids who live in the cold mountains of Toril. They have tricky stone-like skin and in addition have various patches of skin that would cover their bodies. At last, Powerful Build gives me the carrying capacity of a creature one size bigger. The firbolg are Medium—technically speaking. https://warforged-artificer47902.blogdanica.com/28008526/getting-my-motivation-speech-5e-to-work