This quest is part of DLC Pack 2 of the Breath of the Wild Expansion Pass
The hero who tamed the 4 Divine Beasts, there is one more trial that awaits you. This difficult quest will see you mastering a divine weapon that is as much of a blessing as it is a curse, travel the world to solve cryptic riddles that reveal previously unseen shrines, and take on the last Divine Beast slumbering beneath the Great Plateau. Meanwhile, the Rito bard Kass is on a noble quest of his own, searching for inspiration to finish his master's incomplete masterpiece: The Champion's Ballad.
One-shot challenge[edit]
Return to the Shrine of Resurrection and place your Sheikah Slate into the slot. You're now presented with a trial: seek out 4 spots marked on your map on the Great Plateau and defeat all enemies in that region. The catch: you must use the sacred One-hit Obliterator, which can slay any foe with one hit, but also causes you to die in one hit from any source.
The deadly attack power of the Obliterator only lasts for 2 hits, but recovers after a short while, so a stealthy approach is ideal as it lets you pick off enemies one by one with plenty of time to recharge in between. While you don't have your other weapons, you can still use arrows and runes if you prefer to engage from a safe distance, as well as a shield for protection when you mess up a sneak attack. Aim to take out the lookouts and archers first. The lookouts can alert a whole group of enemies to your position, which is not a favorable fight for you, while any stray shot from archers are lethal while you have the One-Hit Obliterator equipped. Defensive armor is worthless, but effects that raise your stealth are extremely handy.
After you clear a region of enemies, a shrine will emerge from the ground nearby. These shrines are different from normal shrines, having a tall pillar jutting out of their tops, and they do not count toward your number of shrines found. However, you do get regular Spirit Orbs that can be used to gain blessings from Hylia statues, giving you an extra Heart Container or Stamina Vessel.
The first group of enemies is in the Forest of Spirits, hiding around the hollow log. This area is almost entirely filled with Bokoblins, with a few Chuchus and a swarm of Keese being the exceptions. Your priority is to defeat the red Bokoblin on top of the log to avoid it alerting the rest when it detects you. The rest of the Bokoblins are either alone or in pairs, which make them easy to pick off individually. One last silver Bokoblin hides on top of the huge tree trunk. The Keese swarm can be problematic even though you don't need to defeat them. While an inactive Obliterator will still down them in one hit, they can quickly power down your Obliterator when you try to chase them off, which can be very inconvenient when you're fighting a Bokoblin as well. Clearing the forest camp reveals the Yowaka Ita shrine.
The next group of enemies is on a small hill located on a flat plain near the Temple of Time. Your foes here are comprised of Lizalfos of all sorts. The barren terrain provides little cover against their arrows, or a way to sneak up close, so picking them off from afar is a wise choice. A group of Lizalfos is especially tough to face with the Obliterator since they like to keep their distance right out of your reach. Beating all the Lizalfos unearths the Rohta Chigah shrine.
The third group of enemies is around the apple orchard near the Woodcutter's Hut. This group is a mix of Bokoblins, Lizalfos and Moblins. The Moblins are the least threatening since they are slow, and their high health is negligible against the Obliterator. The Bokoblin here are mounted on Stalhorses and can spot you sooner than the other foes. Trying to joust a speedy Bokoblin rider while on foot is a risky prospect, use high ground and slowdown assisted arrows to take them out instead. Defeat this menagerie of monsters to gain access to the Ruvo Korbah shrine.
The last group of enemies reside in the snowy region of the Great Plateau. Beware of Ice Chuchus that explode in a lethal blast of cold when you kill them. Your targets here are Moblins, Lizalfos and one Wizzrobe. While the icy environment presents a danger of its own, the elemental affinity of your foes can be used to your advantage. Fire arrows are super effective when dispatching the Ice Lizalfos and Wizzrobe from a safe distance. Meanwhile, a full upgraded Snowquill set will render you immune to their icy attacks. When your foes have fallen, the Etsu Korima shrine shall emerge from the frigid snow.
Mysterious monuments[edit]
After completing the One-Hit Obliterater trial the One-Hit Obliterater will split into four pieces. Link must travel to where each piece lands on his map. At each spot will be Kass and three towers surrounding a flat disk. If Link talks to Kass the strange monument will activate and maps will materialize on the three towers.On each tower is a spot on the map. Talking to Kass triggers a song quest.