The Tornado and Leg Drag Guard Passes are two fundamental guard passes that are used at the highest levels of BJJ in both gi and no-gi competitions. From https://www.grapplearts.com/foundation here is a breakdown of these passes AND how to train them against resistance so that you can become a guard passing machine as fast as possible. One side benefit is that your partner will also develop much better guard retention, so it’s win-win for you and your training partners.