Survival in the Core: I'm writing a guide for the entire server.

The golden light gradually faded.

Lin You stood still, feeling the changes brought about by the upgrade.

"New professional skills..."

He opened the class panel and his gaze fell on the newly unlocked skill slots.

……

【Magic Card Resonance (Unlocked at Lv15)】

[Level: 1/5]

[Note: To further unlock the power of Magic Cards, Card Masters can combine multiple Magic Cards to gain powerful buffs and enhancements.]

[Effect: Unlocks the "Resonance" slot in the Magic Card Encyclopedia. Initially, there are 6 Resonance slots. Each level of this skill adds 1 additional slot.]

[Upgrade: Requires 10 gold coins to upgrade to Lv2, any magic card with a cumulative level of 100]

……

After seeing the skill effects of Magic Card Resonance, Lin You was still completely confused.

It's said that powerful buffs can be obtained by combining multiple magic cards...

You'd better explain what kind of gain you're referring to!

"Forget it, instead of just rambling on, it's faster to get started and put it into practice."

Lin You summoned the Magic Card Encyclopedia and found that a new page had been added.

This page has 6 blank spaces in the middle, and 4 spaces blocked by chains.

[Resonance Slots: 6]

[The following are the available magic cards...]

[Slime: +0.5 HP Regeneration/second]

[Mushroom Monster: +1% Healing Effect]

Skeleton Soldiers: +1 Melee Damage, +1 "Undead Invasion"

[Zombie: +1 Defense, +1 "Undead Invasion"]

[Kobold Warrior: +5 Melee Damage, +1 "Kobold Horde"]

[Kobold Shaman: +10 Spell Damage, +1 "Kobold Horde"]

[King Slime: +1 jump attempt]

[Tungsten Steel Drone: +10 Energy Shield, +1 "Tungsten Steel Mechanical Legion"]

[Tungsten Steel Hover Tank: +1 Damage Reduction, +1 "Tungsten Steel Mechanical Legion"]

[Tungsten Steel Walker: +10% Movement Speed, +1 "Tungsten Steel Mechanical Legion"]

[Tungsten Steel Amplifier: Current "Tungsten Steel Mechanical Legion" Resonance Level x2]

……

"I see……"

After browsing through this long list of available magic cards, you can see their resonance effects.

A look of realization dawned on Lin You's eyes.

"I thought it was something else, but it's just a relic!"

In short, the Resonance slot can be seen as an extra accessory slot, but it can only be equipped with Magic Cards.

Each magic card provides different bonuses and resonance levels.

For example, each "Skeleton Soldier" placed in the Resonance slot can provide 1 point of melee damage bonus.

If you fill all 6 resonance slots with "Skull Soldiers".

In total, you can gain +6 melee damage and level 6 "Undead Invasion" resonance.

Lin You clicked on the resonance effect of "Undead Invasion" to take a closer look.

……

[Resonance: "Undead Invasion"]

[Note: Each level of "Undead Invasion" resonance grants you a +5% damage bonus and damage reduction against undead creatures.]

……

"So, if I place 6 skeleton soldiers, I can get a full 30% increase in damage dealt to undead and damage reduction?!"

Lin You did a rough calculation and was immediately amazed.

Keep in mind that a silver necklace only provides 10%, and that's the only effect.

His casually put together item is worth more than the combined value of three silver necklaces!

Not to mention, he can also adjust the magic cards in the resonance slot at any time according to the enemy he is facing.

Of the magic cards Lin You has collected so far, only "Undead Invasion" resonates.

There are also two other types: "Kobold Tribe" and "Tungsten Steel Mechanical Legion".

The former can increase mining output, doubling the mineral output probability by 2% per level.

The latter provides a summon damage bonus, increasing summon damage by 5% per level.

"Not to mention, we'll be able to keep acquiring new types of magic cards in the future..."

Lin You's eyes grew brighter and brighter; just thinking about it made one's heart race.

"Upgrade requires 10 gold coins plus any magic card with a cumulative level of 100."

"I have enough resources to upgrade... let's upgrade now!"

His card collection is not lacking in magic cards.

The 10 daily undead invasions continuously fueled his card collecting spree.

As for gold coins... how could Lin You possibly be short of money?

Regardless of the fact that he hasn't even spent all of the 20 gold coins he received as a first kill and event reward.

I've earned several gold coins just from running the "Tungsten Steel Machinery Workshop" dungeon these past few days.

Although his guides are free, as the guide writer, he naturally knows the market's future price trends.

He could make enough money every day by casually buying and selling some "strategic materials" to live on.

Only Lin You could make a guaranteed profit from this kind of business.

Because of the "Earth's Core Pioneer" title effect, he can avoid the teleportation fee for cross-level transactions.

Other players who want to become resellers must first overcome the hurdle of the transfer fee.

[The "Magic Card Resonance" skill has been upgraded to Lv2!]

Your Magic Card Resonance slots have increased from 6 to 7.

[Next upgrade requires: 100 gold coins, 100 magic cards of level > 10]

Lin You: "..."

He retracted his earlier comment that he was not short of money.

"I'll save it up slowly..."

Shaking his head, Lin You closed the Magic Card Encyclopedia and turned to walk towards the Gold Rush Ship.

The passage to Earth's Core 10 has been opened; he has no reason to linger.

Flame Spirit had already jumped into the passenger seat, her two jewel-like eyes blinking adorably.

"Let's go."

Lin You started the engine, and the minecart drove towards the newly formed dark passage.

[Heading to the 10th level of the Earth's core]

[Estimated time: 600 minutes, 1000 fuel]

"A full 10 hours!"

"Oh well, might as well take a break."

Lin You leaned back in the driver's seat, opened the forum, and browsed today's "Geocentric Daily".

The headline immediately caught his attention.

"Tungsten Steel Workshop Craze! The Era of Everyone Running with Knives Has Arrived!"

He clicked on it and quickly browsed through it.

Elena has compiled player feedback since the "Tungsten Steel Machinery Workshop" dungeon opened.

With his guides, the normal difficulty dungeons became a "cash cow" for almost all players.

You can earn more than 10 silver coins in a single trip, and if you're lucky, you can even get 20 silver coins.

While the hard mode is more difficult, the rewards are also greater.

Some players have already posted screenshots on forums showing their earnings of up to 2 gold coins.

The comments section below the daily report was also bustling with activity.

"I made three trips to the regular workshop yesterday and earned a net profit of 45 silver coins. That's much faster than mining!"

"Me too! Thank goodness Lin You listed all the high-value items in his guide, otherwise I would have missed out on so many treasures!"

"I heard someone has developed a farming method that avoids combat entirely, just opening chests without fighting, which is much more efficient!"

"I saw that avoidance strategy, it's really impressive. It avoids drones the whole time, the alert level rises slowly, and you can open more crates."

"Unfortunately, it requires too much memory. I almost got lost in the workshop several times, not to mention speed-running the knife."

"A guide to the 'avoid combat, run and attack' strategy is here; feel free to check it out if you're interested."

Lin You couldn't help but smile when she saw this comment.

"There are still a lot of skilled players among them; they've even managed to figure out this kind of strategy."

He clicked on the guide to avoiding battle and read it carefully.

The poster was a player named "Qiao Feng," and the post was very detailed.

From the patterns of patrol routes to the distribution of supply boxes, and then to the selection of evacuation points.

Each step has a clear path plan, complete with illustrations and text.

The post also includes a video clip showing that no enemies were killed, but nearly 20 crates were opened.

This post is very helpful for players who are afraid of fighting and getting hurt.

"There's strength in numbers; someone will always come up with a solution I haven't thought of."

Lin You sighed and casually gave the post a thumbs up.

He closed the daily report and opened the strategy shop.

Strategy Points: 12450

After these few days of accumulation, the strategy points have finally broken through five figures.

If I hadn't exchanged so many Secret Realm Refresh Cards beforehand...

This number should be surpassed sooner.

"I can buy an item worth over 1 points now..."

Lin You's gaze fell on a certain option in the strategy shop.

[Legendary Gear Clue: Purchase to unlock a quest chain containing a random legendary gear item]

"You are the one!"

"Buy!"

[By spending 10000 strategy points, you have obtained "Legendary Equipment Clue" x1]

A crimson light exploded before Lin You's eyes.

The light coalesced into an ancient parchment, which slowly floated into his hand.

Lin You unfolded the parchment, and a line of text appeared on it.

[You have triggered the quest chain: Reforging the Terra Blade (Unique)]

……