This loop lets you convert a well-stocked graveyard into a limitless green economic engine, perfectly suited for Commander, Legacy, Oathbreaker, and Vintage tables. Steward of the Harvest is the linchpin here, serving as the conduit that grants your creatures the activated abilities of any lands it exiles—allowing them to tap for green mana just like Evendo, Waking Haven can. By equipping Sword of the Paruns to that mana-producing creature, you unlock a self-sustaining cycle where its activated ability generates more than enough green mana to pay for the Sword's untap cost. Because Sword of the Paruns also lets you tap or untap the creature on demand, you can repeat this process infinitely to yield limitless green mana and endless untaps for your entire board.