If you hope to reclaim Sea Gate, you will need the help of all those willing and able to fight. But when you approach a group of Zendikari, they are hostile. They band together against you, the outsider. You're going to have to prove yourself.
Try to stall the Zendikari onslaught. Use Stasis Snare on Kor Entanglers or Tajuru Beastmaster. Once you've stabilized deal damage with flying creatures --there are no fliers in the opponent's deck. Use Felidar Sovereign to gain life back.