Brimstone is possible in greed mode, but I've only ever found it through Pandora's box or sacrificial alter : r/bindingofisaac
soooo, Pandora box, blue Key, damocles and crooked penny made wonder : r/bindingofisaac
Strange Key and Pandora's Box on first floor. 1.000+ hours and never got this combo before : r/bindingofisaac
Steam Community :: Guide :: Pandora's Box Effects
Binding of Isaac: Afterbirth Item Spotlight - Pandora's Box Payouts by Floor - YouTube
🜏 Edmund McMillen 🜏 on Twitter: "Spoiler: Pandora's box! this is one of a few "one use items" that destroy themselves when used. 1-5 are ok, but rolling a 6 on this
Opening Pandora's Box - Unknown Use of Strange Key - YouTube