Resolve the Golgari Rot Farm trigger, returning it from the battlefield to your hand.
Resolve the Springheart Nantuko trigger, causing you to pay 1 to create a token copy of Wayward Swordtooth.
Because of the additional Wayward Swordtooth token, you can play an additional land this turn.
Repeat.
This looping engine harnesses Amulet of Vigor to immediately untap Golgari Rot Farm the moment it enters the battlefield, allowing you to tap it for mana before its own bounce trigger returns it to your hand. That self-bouncing land provides a limitless supply of land drops, which Wayward Swordtooth lets you continuously replay thanks to its extra land-drop allowance. Meanwhile, Springheart Nantuko uses its landfall ability—fueled by the mana from Golgari Rot Farm—to endlessly copy Wayward Swordtooth and flood the board with creature tokens.