Durable is horrible, and it gets worse the larger your hitdie is. A Con 18 Barbarian going from 5-16 healing to 8-16 healing is nothing. Especially when you only recover HALF of your hitdice during a long rest, so this won't even help you 'naturally' heal anything.
If Durable skipped the roll and just let you treat each hitdie as its maximum, even then it would still only be worth taking in a specific kind of a campaign. But at least then it would fit the other campaign-specific feats on this page.
I'm liking these feats. Quality over quantity and all that.
BTW, two different elements for "thunder" and "lightning"? I can see that getting mixed up unintentionally.
Quite nice feats examples, definitely confirm that the magnitude of 5e feats is at least twice compared to previous editions.
Elemental Adept also is powerful, and gives a traditional flavor to a spellcaster... I am not so glad it allows bypassing energy resistance, but at least they didn't make the terrible mistake of letting it bypass energy immunity.
Eh, the feats are not as good as a +2 in a primary ability score so meh to most of them.
Eh, the feats are not as good as a +2 in a primary ability score so meh to most of them.
Thunder = Sonic
Lightning = Electricity
They should have just used sonic and electricity but to late now.
Elemental Adept also is powerful, and gives a traditional flavor to a spellcaster... I am not so glad it allows bypassing energy resistance, but at least they didn't make the terrible mistake of letting it bypass energy immunity.
Mechanically I agree that it's niche and not very strong. But the +1 to Con offsets that; compared to a +2 to Con it's possibly a wash, since you would probably take this over a +2 to Con when you have an odd Con score and you're after less downtime and/or lack magical healing it may be the right choice. So weak yeah, but I wouldn't consider it a "gotcha" feat.
I think the balance on these is not comparing them to other feats (I'm betting it is indeed weak then), but always comparing them to a +2 bonus to an ability score.