Anyone figure out how exactly these work or what they do. There seems to be a lot of variance with the hearts, with item power determining the armor and potency cap of effects that scale (like the damage on the chain lightning one)
Near as I can tell I have no clue what the level of the heart does, and there’s no mechanism in place to upgrade them which kinda sucks.
I believe they scale with the our characters’ level when we craft or loot them.
I mean the item power for them does certainly, but there’s still no clear indication of what the heart level does.
Highest I’ve found so far is a level 3
Higher level hearts have better effects. For example the rogue heart that has lucky hit chance to throw stun grenades at enemies only throw 3 grenades at level 1, but that increases to 6 at level 4.
Sites like Maxroll will probably update info on the hearts, so just wait a bit.
Oh OK.
Yeah there’s also more RNG on them than I care for frankly. For example you know how most Aspects that have multiple ranges on them usually calculate both in the same roll?
Yeah hearts don’t. It’s possible for the first the number to be maxed and the second minimum (I have personally had this occur) and it really sucks when it does.
As a worst case example, the Necro ultimate heart can end up rolling with low damage (51% I think?) but maximum essence drain, or vice versa for best case which is cool but… That’s a lot of RNG.
Update
OK so I can now officially confirm exactly what Heart Levels do, and they are indeed powerful - probably the single most important thing to look at when evaluating Hearts honestly.
They affect the ranges of the powers. I cannot definitely state that this is the case for every single Heart - particularly the Wrathful ones that only drop in WT4 - but at least out of the Barbarian ones I have gotten so far, a higher heart level means a bigger/better range on the ability values.
For example Lionheart normally has 10% barrier generation at level 1. I have gotten level 2 and 3’s that bump that up by 1% each, as well as the amount of life per second you recover.
TL;DR you can’t evaluate all the hearts just by going off their default listed values because those are all for the level 1 variants, which has me wondering just how insane The Barber and Ignoring Pain can get (the Necro super that boosts minions is likely insane with a high level heart)
False, they drop from WT2 capstone dungeon and beyond.
It literally says WT3/4 next to some of them in the patch notes, and those are the ones I am referring to.
Did you even read my comment? WT3 is not WT4, you know, like you effing said. Also, the fact that they literally drop from the WT2 Capstone dungeon is not an opinion. Just take the L, you were wrong.
He is obviously referring to the class specific “Super” wrathful hearts that ONLY drop in WT4 or did you not read his comment? Enjoy your L 
No they don’t. I have Vile Apothecary from early WT3 (it’s Rogue’s “super” heart)
Are you possibly autistic? All the information he gave was “wrathful hearts”, not class specific rare ones. And wratful hearts already drops from first capstone dungeon.