1.Gate of Despair
2.Hope 100+
3.Money 1000+
4.The Merchant or The Coward Lv max

1.Go to Gate of Despair
2.Activating the Statue of the Witch for Curse of the Witch Lv 10
3.Return to The Refuge
4.Reroll item at The Merchant or The Coward

It will be Easier to Find. GoodLuck

(You can use the Merchant's Shoes to Increase the Rate a Little bit.)
(You can Attack Box for a Little Money)

And

Set for Ember Lv 10 [imgur.com]
Request : Crimson Hall Buff