With the start of the main quest, Regional Phenomena, which requires you to visit all 4 corners of Hyrule, a second one also starts. This quest, Tulin of Rito Village, will task you with finding Tulin, one of the five Sages. To get help from the Sage, you first have to Find Tulin you are looking for in the Mountain Cave of Zelda: Tears of the Kingdom.
Unlocking the Rospro Pass Skyview Tower will give you an advantage in terms of navigation since, along the road, you will be marking some fast travel points, and without a proper map, you won’t be able to identify which one is the right marker.
Secondly, make sure to make some cold-resistant and heart-regeneration meals since you will be traveling through cold wind to reach The Wind Temple.
Talk to Teba in Rito Village
The quest starts when you talk to the Elder (Teba) in Rito Village. He asks you to talk to Harth and points out a lodge with two campfires in the northwest direction.
Follow the campfire to the lodge. The next step is to talk to the NPC in Purple and Black, Harth. To reach the campfire, the fastest possible way is to glide toward the hut with small fans on the roof.
Position yourself in front of the fan facing north, jump and open your Paraglider, this will give you a boost to reach the nearest mountain. Climb the mountain and from there go northwest, you will land slightly below the land, climb up and follow the quest marker to reach the lodge known as the Hebra Trailhead Lodge.
Remember to glide from the edges of mountains, or else you will fall into Lake Totori. When you talk to Harth, you will learn that Tulin and some of his companions went to a mountain cave to find food.
Harth will show you the direction of Hebra South Summit Cave northeast of the lodge. Before leaving the lodge, make sure to pick up the Spices and Oil Jars. After talking to Harth, the objective will be updated and now you need to find Tulin in the Mountain Cave.
Reach the Hebra South Summit Cave
To reach the Mountain Cave and find Tulin in Zelda: Tears of the Kingdom, the first step is to climb the ladders on the right when you leave the lodge after talking to Harth.
Follow the straight path until you find a bonfire. Talk to Cecili (-3514, 2398, 0209), standing beside the fire. She will tell you to go up the hill to find her friends who went to find some food in the cave.
Follow the linear path until you reach the cave. If you see an NPC standing in front of it, you’ve come in the right direction.
From here on you will need Ultrahand ability to cross the cave since there is a pond of cold water that will deplete your Hearts if you try to swim across it.
You can either make a straight bridge-like structure outside the cave and then take it inside or you just take one wooden piece and make use of the logs already floating in the water, either way, you will have to take something inside and both methods work just fine.
Meet Tulin at Talonto Peak
After crossing the pond of water, don’t go straight. Look up, and you will notice a small opening. Climb up the wall and enter the opening. Take out the flying creature inside the cave. Right where you killed the creature, use the Ascend ability, which will take you right above the cave. From there, go northeast.
Once you reach the pillar, use the Ascend ability again to reach the top of the pillar, then follow upwards and climb the mountain. This path will take you straight to Tulin, atop the Talonto Peak. You need to talk to Tulin to initiate the next objective, which is to Get Tulin’s Bow from the flying monster.
Retrieve Tulin’s Bow
The cutscene shows the flying monster that stole his bow. Glide to the platform beneath the monster to get closer to it and hit it with arrows. Two arrows would be enough to bring him down. A short cutscene starts, where Tulin gets his bow back, and several enemies spawn out of nowhere. You need to take out those enemies, which is fairly easy.
After killing all the small monsters, Harth and Gesane will arrive and ask you to find out the reason behind the Storm Cloud above Hebra Peak.
Now that you have found Tulin and given him his bow back, the next objective is to reach the Rising Island Chain by crossing the Hebra Peak and Investigating the Storm Cloud in Zelda: Tears of the Kingdom.