Instructions
Advancing Through Pojar Forest
Exit the city to the east. Go east until you are blocked by rocks held by vines. You will have to use a Minus Staff to continue east until you are stopped by a river.
Use the Minus Staff to release a rock that will dam the river. There is another Minus Staff at the bottom of the dry river. Continue east, using your Minus Staff to create another dam for the next river you encounter.
Use the Minus Staff to remove a shrub to the south at the second river. Continue heading south until you climb up the broken ladder. You will then encounter Regulus.
Duel and defeat Regulus. He uses a Beast-themed deck, but your deck should be strong enough to overcome him.
Leave the Spirit World and Pojar Forest during the cutscene. You will gain the ability to use Torunka's staff in the real world.