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 ingenious loop uses Golgari Rot Farm to continuously bounce itself back to your hand, generating the exact land drop you need to keep replaying it over and over. Every time the land re-enters the battlefield, Stone-Seeder Hierophant untaps so you can tap it to untap the Rot Farm in response, while Springheart Nantuko uses those repeated landfall triggers to churn out an endless army of token copies. Meanwhile, Wayward Swordtooth provides the crucial extra land drop capacity required to keep this bounce-and-replay engine turning endlessly.