I went in as RNG yesterday and tried elementals kills with true flight, did 10 elementals, no chests drops, I moved to umbrils and got chests after x3 kills, and then another 3 kills {6 umbril kills only}, the only thing that changed was the mob, both were true flight spam, rng only doing dmg/actions
I'm going to have to bring a bunch of holy waters and try this tomorrow as three runs in a row now I've killed 20-25 elementals in a variety of ways and can only get metal and shard chest. Note I cannot do the 15k damage weaponskill as the final blow on elementals people are speaking of. The chest you got today, were any of them the blue one?
Pretty sure these have to be B mobs weaknesses. When we did ours the first time, I got it using Tenebral Crush on Light elements for both KIs. Got them on the same pull.
So there seems to be a lot of question about Casket #B1. Today, the update to the bgwiki page says the method is
confirmed to be "7 Total 15K+ Kill shots on Biune foes (no SC), Any damage type counts."
I'm posting the relevant bits of my log file from last night. I went with a PUP and split off from the rest of the group working on A objectives and teleported to the B portal, doing a quick /hurray for 1/7 on B ojectives before heading northeast to the fire elementals.
Kaht gives a triumphant cry with the Diaphanous Device #B!
#B treasure coffer status report: 1/7 #?: 0/1.
Kaht received 100 gallimaufry for a total of 2894.
1st Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 59728 Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] Requiescat ¨ Biune?Fire?Elemental
[Kaht] 5513 Requiescat ¨ Biune?Fire?Elemental
Distortion: 5889 ¨ Biune?Fire?Elemental
[Kaht] 46342 Leaden Salute ¨ Biune?Fire?Elemental
Darkness: 99999 ¨ Biune?Fire?Elemental
Kaht defeats the Biune Fire Elemental.
2nd Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 46991 Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] Requiescat ¨ Biune?Fire?Elemental
[Kaht] 5614 Requiescat ¨ Biune?Fire?Elemental
Distortion: 5985 ¨ Biune?Fire?Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 51533 Leaden Salute ¨ Biune?Fire?Elemental
Darkness: 99999 ¨ Biune?Fire?Elemental
Kaht defeats the Biune Fire Elemental.
3rd Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 45175 Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] Requiescat ¨ Biune?Fire?Elemental
[Kaht] 5756 Requiescat ¨ Biune?Fire?Elemental
Distortion: 6118 ¨ Biune?Fire?Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 45332 Leaden Salute ¨ Biune?Fire?Elemental
Darkness: 99999 ¨ Biune?Fire?Elemental
Kaht defeats the Biune Fire Elemental.
4th Elemental
[Kaht] Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] 42032 Leaden Salute ¨ Biune?Fire?Elemental
[Kaht] Requiescat ¨ Biune?Fire?Elemental
[Kaht] 3553 Requiescat ¨ Biune?Fire?Elemental
Distortion: 4036 ¨ Biune?Fire?Elemental
[Kaht] 47975 Leaden Salute ¨ Biune?Fire?Elemental
Darkness: 99999 ¨ Biune?Fire?Elemental
Kaht defeats the Biune Fire Elemental.
#B treasure coffer status report: 2/7 #?: 0/1.
Kaht received 100 gallimaufry for a total of 3177.
The chest that spawned was definitely Casket #B1, a blue chest (evidenced by the lack of a shard or metal drop in the log). Not only did it NOT take 7 mobs to spawn, but all 4 of them were killed with a 3-step skillchain with the killing blow being skillchain damage. This contradicts almost every aspect of the "confirmed" method listed on bgwiki. Interestingly, Casket #B1 spawned BEFORE Chest #B3/#B4
I'd say this one is far from solved.
Edit: I double-checked the logs, we got Chest #B3 (shard) from a leaden kill (no SC) on a fire elemental. We ended up clearing out the fire elementals before Chest #B4 popped, so we headed to the earth/darkness elemental camp. Got Chest #B4 to pop from an Earth elemental from a darkness skillchain.