This is a complete 2 rb guide.

The quests takes place in Evil Abyss.
Stage 1: Killing lords for quests items. 117 moss, 117 dreamgrass and 117 soularoma is needed for stage 1.
Lords are FearlessBeast 570,148, FurySkeleton 605,298, DeamonBat 565,494, FiendLord 462,590, SeargentSpirit 271,632, DeamonLord 125,594, FuryApe 739,104, HadesLord 1070,707. A total of 81 ghosthorns is needed, 27 featherstones, 9 vigor fragments and finally 3 pure vigors and stage 1 is complete.
Stage 2: Continue to kill lords for razing the mountain of grievance it is 40000 meters high, killing a lord will lower it 500 meters, normal monsters there 6 or 20 meters.
Stage 3A: Now it is time to kill the 8 curses there in the following order Andrew 098,541, Peter 304,681, Philip 471,593, Timothy 662,486, Daphne 699,325, Victoria 647,984, Wayne 553,095 and Theodore 998,694, killing all 8 counts as 1 round in all 9 rounds has to be done for completing stage 3A. When this is done all lords now drops squamabeads, 1 is needed for summoning satan.
3B: Kill satan, when he is killed beastsatan will summon automatically the finally furysatan kill this one also and quest is complete.
When quest is completed talking to Alex, all he now will do for you is 2 rb, he woun't let you in EvilAbyss anymore.
I hope this info can help doing this quest and remember don't waist time on killing any curses until stage 3A, doing it don't give any exp. Finally don't collect items for making red or white flowers those are worthless, all they can be used for is the hadestoken, which ain't worth 1 gold totally useless so far, TQ promised about 1 year ago to make it possible to swop the hadestoken for a gift, but so far this haven't been put into action.
Thnx to I_AM_ME for correct meters the mountain will be lowered when killing lords.
Killing satan yesterday learned me another thing the hard way, satan - beastsatan here it doesn't matter who kills those but fury satan has to have the final blow from the player who summoned satan, otherwise all 3 has to be killed over again