This clever loop transforms a humble discard spell into an infinite engine by leveraging Bone Miser as the ultimate resource generator; whenever you discard Dryad Arbor to Psychic Miasma, Bone Miser's triggered ability rewards you with two black mana. Meanwhile, casting Psychic Miasma triggers the magecraft ability of Extus, Oriq Overlord, allowing you to seamlessly pull Dryad Arbor right back out of your graveyard and into your hand. Because Psychic Miasma even bounces itself back to your hand whenever a land is discarded, the whole process feeds itself indefinitely.