Jake quickly glanced at each of them and then made his choice, " Give me Ephemeral Plunderer''s Grimoire"

    [Are you sure, taking an Ultimate Authority will make unable to get any more Authorities until you reach S rank] Nexus asked.

    Jake paused for a second and then said " Just give me this one"

    [Okay]

    As Jake made his choice, a surge of ethereal energy enveloped him. The air shimmered with arcane power as the Ephemeral Plunderer''s Grimoire Authority manifested within him. Nexus confirmed the acquisition with a subtle acknowledgment.

    Unlike his previous time, Jake had a lot of Soul strength to spare, sparing him from fainting or feeling any pain.

    Jake closed his eyes for a second and digested all the information, and then opened his eyes and looked at the Goblin Lord.

    "Guys stop acting, that beast intelligence is better than any other C rank beast" Jake said and his friends serious demeanor vanished.

    "Tch, I though we will also clear this gate without using our arts but this guy had to be intelligent" Jimmy murmured looking at the Goblin lord who is now looking at them seriously.@@@@

    "Well, let''s use String shot formation" Mark said rubbing his chin.

    "I agree" Jake

    "Me too" Jimmy

    "Hmmm" Emily.

    The ethereal grimoire in Jake''s soul space seemed to resonate with his intentions as he muttered, "But first, let''s take care of that small fry." His gaze focused on the dwarf goblin, the Beastmaster Goblin, wielding the bone staff and standing beside the Goblin Lord.

    Jake pointed his hands towards the dwarf goblin, and his chained dagger swiftly shot towards the target. The Goblin Lord frowned, realizing the impending danger, and leaped in an attempt to save the dwarf goblin. However, Jake''s chained dagger moved with remarkable speed.

    The ethereal chain extended, wrapping around the Beastmaster Goblin before the Goblin Lord could intervene. The chained dagger pierced through the dwarf goblin''s Head and heart, and a brief moment of surprise flickered across its face. The Goblin Lord''s attempt to rescue its subordinate proved futile as Jake''s precision and speed outmatched the creature''s efforts.

    The dwarf goblin let out a screech, collapsing to the ground as the ethereal grimoire absorbed its essence. The Goblin Lord landed back on the throne, glaring at Jake with a mix of fury and frustration.

    Jake looked at the Grimoire and saw the fist page of it became engraved with many runes, And Jake learned he can transfer this runes to any one core and let them have this ability.

    "You..Humans I will skin you all alive!!!" The Goblin lord shouted and ruched at them holding a Bone Great sword, The black panther also died alongside the Dwarf goblin leaving only the boss.

    Jimmy rushed to parry the sword the moment their swords collided, Jimmy opened his mouth and a sonic boon attacked the Goblin Lord. The Goblin lord''s ears bled and he jumped backwards and then his bone sword engulfed in black flames which he slashed towards Jimmy and a dark slah formed and moved towards Jimmy.

    This is all thanks to Jimmy''s art:

    Zephyr Harmonics:

    "Any change?" Reynold asked after Sera put the key stone on the table.

    Sera shook his head while others sighed while Jake anticipated all of that, thanks to quest that sprang up after they cleared slime gate and Key stone rank increased.

    [ Continuous Quest : Gate evolution

    Condition : Clear Goblin Cave (1/2)

    Reward : Key upgrade to next rank

    Time limit : None]

    "It''s weird it''s neither breaking nor changing it''s coordinates" Sear said.

    "Hmm, now maybe it''s no longer will change coordinates" Tom said.

    "maybe it''s need to be cleared more than once" Jake shrugged trying to hinting at the problem.

    Sera, Reynolds, Tom and his friends looked at him collectively.

    "That maybe the reason" Tom said and then once again poured his energy in to the core and once again Goblin cave portal materialized.

    Tom then entered the portal and just after 2 minutes came out of the portal with various junk equipment and bone staff and Bone Greatsword.

    The portal broke down once again and Sera picked up the key and looked at it and exclaimed " It''s changing once again".

    "Its definitely a treasure" Reynold said and othrs nodded.

    Sera then called Jake towards her and said " Since you discovered it, let''s bind it to you, that way it will be only lost when you die".

    Sera then started muttering incomprehensible language and a thread appeared which got attached to Jake and the key.

    [Connection formed with Key stone, Now only user can use the key stone]

    Sera nodded, advising Jake to take care of the key and emphasizing not to enter without his friends. As the mystery was solved, Tom expressed his intention to leave.

    "Now that the mystery is solved, I will be returning," Tom said, standing up to leave. However, he suddenly turned back, taking out a purple silver box and placing it on the table. "A gift for you brats. We were planning to give it to you on the day of departure, but consider it a reward for clearing the Goblin gate without my help," he explained before exiting the house.

    Curious, Jake approached the box and opened it to find four platinum rings inside. "Mom, Dad, what kind of ring is this?"

    Reynold explained, "Storage rings, crafted by Tom himself for all of you. Each has a storage capacity of 500 square meters."

    Jake and the others'' eyes lit up with excitement as they each took a ring. Quickly trying them out, they discovered a spacious interior within the rings. Additionally, the rings contained a trophy-like item. Upon inspection, Jake realized it was crafted from the bones of the first beast they had slain, serving as a symbolic proof of the beginning of their magnificent journey.

    Grateful for the thoughtful gift and acknowledging the significance of the trophy, Jake and his companions felt a surge of motivation. With their newfound storage rings, they were now equipped to carry the spoils of their adventures and face whatever challenges lay ahead in the magical world.