First for people who don't know what this is(for others, skip to last 2 paragraphs).

If you open a 250k koin chest that appears after you buy the 3k soul thing in the river in the dead woods, you get 1 Soul Thurible Tower Key. That tower gives you some Kollector skins and Kollector's Koin. If you replay that tower it also gives you 5x Soul Thurible Tower key which means you can grind these. And every time you summon one, the rewards om the left are the same. Which means all that Kollector stuff you unlocked is now useless but you still get Kollector's Koin every time. That let's you summon him in The Krypt if he is not there. But that's not all...

Kompletion rewards are always the same the first time you summom the tower. The rewards after are random and I think they depend on the time of the day. Rewards could either be Koins(usually 50k) or tower konsumables and forge items. So you can farm koins but you can also farm souls. I'm sure by now you've heard about Transmute souls recipe right? So if you kombine 2x Lost Soul Essence and 1x Necromantic Runestone you get 250 souls(210 because 40 you need for forging). Well, that Soul Thurible Tower can give you both.

Back to where I said the rewards depend on the time of the day. Last night, during the Liverpool - Barca game I was grinding this tower with my Noob Saibot AI. I didn't get a single 5x Necromantic Runestone reward but I did get 5x Lost Soul Essence. And it seemed that it always took couple of replays till I got one and then I started counting and checking what the rewards are. And it looks like it's a pattern. Every 6th time I played through the tower, the rewards was 5x Lost Soul Essence. So I went through 2 more times and went to bed.

I got back to it this morning and it seemed it didn't work anymore. It has changed. The 5x Lost Soul Essence was at like 10th replay or something. So instead of 30 minutes it took 45. Fuck that, not worth it.

But right now, as I'm writing this, the 5x Lost Soul Essence is a reward when you replay the tower the 2nd time. And what's even better, when you replay it the 1st time, the reward is 5x Necromantic Runestone. So if you summon the tower right now, play through it 3 times with Noob AI, it takes exactly 11 minutes and you got yourself 420 souls. Then you summon another tower and do it again. Do it twice, and you got 1050 souls in 22 minutes. Around 3k per hour.

So it might be that it depends on the time of the day like I said but this is literally a gold(or soul) mine if you are there at the right time.