What features in 5e are directly tied to the character’s Constitution score?

I’m looking to make a character based on Constitution rather than a traditional stat. This list would include features such as Fire Genasi’s ability to cast Produce Flame with their Constitution Modifier and Stone Sorcerer (UA) calculating their AC according to their CON modifier.

Of particular interest are features that are explicitly tied to constitution, rather than features that partially rely on constitution such as Barbarian’s Unarmed Defense feature.