Kodama trigger, choosing to put nothing onto the battlefield from your hand.
Resolve the
Trench Behemoth trigger, targeting any creature an opponent controls.
Resolve the
Tireless Provisioner trigger, creating a Food or a Treasure artifact token.
The Food or Treasure enters the battlefield, triggering
Kodama.
Holding priority, activate
Trench Behemoth by returning a land from the battlefield to your hand, untapping
Trench Behemoth.
Resolve the
Kodama trigger, putting a land onto the battlefield from your hand.
Trench Behemoth and
Tireless Provisioner trigger.
Repeat from step 5.
Once you have infinite Treasure and/or Food tokens, you may activate the Treasures for infinite mana, and then activate the Foods for infinite lifegain.