Are the boss mats getting redesigned, or staying as-is?

Because I can’t picture Living Steel or a Malignant Heart opening a chest.

All bosses are free to summon now; only the key is needed to open the chest reward after killing.

So from what it looks like, all summoned Maat will now be considered keys (same item names as currently). It looks like 4 per chest will open.

Andy and Duriel will only need 1 key type now (no longer two maat), so a shard of agony for Duriel and a doll for Andy. Which still drop from the respective bosses you had to farm for the 2 summoning mats currently.

They’re adding 3 new lair bosses.

Urivar will have his own key, and you need to farm him to get keys for Harbinger of Hatred, which both of these are locked behind the VoH area.

And they all have a chance of a mini Belial to spawn after killing, which drops the key for the Exalted Lair Bosses: Belial, Lord of Lies.

Right. What I was asking is if they are turning the items into literal keys. Because it’s kind of weird to have something like a bottle of water (Distilled Fear) function as a chest key.

I think it was just easier to keep the same item and recycle them into keys, as that is what people have gotten used to for association with what bosses needed what item to summon them. I do agree it’s interesting to not become actual keys.

I’m pretty sure they said you can exchange all your boss mats into keys (just not sure about the ratio), and even choose the type of key you want to have (Andy, Duriel, Aspect of Hatred)

The only Boss that will require some kind of “mats” will be the “True form” Belial (Abhorrent Heart or something like that)