Sword x Staff Fantomon Guide – Best Pets, Evolution

Fantomons are one of the most important progression systems in Sword x Staff, but many players do not realize just how much power they provide until much later in the game. At first, they simply look like collectible pets that follow you around during combat. In reality, Fantomons are a massive source of stats, passive bonuses, combat utility, and long-term account progression.

The good news is that the system is much easier to understand than it first appears. Once you know how deployment, leveling, resonance, and evolution work, managing your Fantomons becomes much more straightforward.

Whether you are trying to figure out which pets are worth pulling, how to level them efficiently, or why everyone keeps talking about Mythic duplicates, this guide covers everything beginners need to know about Fantomons in Sword x Staff.

Sword x Staff Fantomon Guide – Best Pets, Evolution

Fantomons are companion pets that provide passive stats and can also fight alongside you during battles.

They unlock once your account reaches Level 50 through the large tree system located at your home area.

Even before entering combat, Fantomons already increase your overall combat power by giving:

• Extra stats
• Passive bonuses
• Utility effects
• Battle assistance

Later on, evolved Fantomons can even materialize during fights and use active combat skills.

This is why Fantomons become such a huge part of late-game progression.

How To Obtain Fantomons

Fantomons are summoned through the Fantomon tree at your home.

The system works similarly to a gacha banner, but the game is actually fairly generous compared to many other mobile RPGs.

Fantomon Summon Rates

Current base rates are:

• 0.8% for SSR Fantomons
• 5% for SR Fantomons

Additionally:

• Every 10 pulls guarantees at least one Summon Crystal
• 60 Summon Crystals can be exchanged for a Mythic Fantomon

Even if your luck is terrible, the crystal pity system slowly guarantees progress toward top-tier pets.

Best Mythic Fantomons

Currently, the two main Mythic Fantomons available in the shop are:

• Aegiswing
• Nyxarchon

Both require:

• 60 Summon Crystals

There is also:

• Sylvaerie for 18 Summon Crystals

However, most experienced players strongly recommend saving crystals for the Mythic options instead.

The power gap between Mythic Fantomons and lower-rarity alternatives is massive, especially later in progression.

Duplicate Copies

This is one of the biggest mistakes beginners make.

Getting a Mythic Fantomon once is not enough.

To fully evolve a Mythic Fantomon later, you will need:

• A second duplicate copy

This becomes important at:

• Level 108
• After unlocking Nimbuville

Because of this, players should plan their crystal spending carefully instead of buying random pets early.

If you spend crystals recklessly, you may delay your evolution progression by weeks.

Kels Is Arena Shop Exclusive

Unlike most Fantomons, Kels cannot be summoned through the normal tree system.

Instead, Kels is only obtainable through:

• The Arena Shop

That means Arena Tokens become much more valuable than many players initially expect.

If you are active in PvP, it is worth regularly checking the shop for Kels shards and related materials.

Fantomon Deployment

One of the most confusing parts of the system for beginners is deployment.

You have:

• 4 active deployment slots

However, every Fantomon you own still provides stats.

The difference is simply how much of their stats are applied.

Stat Distribution

Your Fantomons provide stats at different rates:

• Main Slot → 100% stats
• Other deployed slots → 50% stats
• All remaining owned Fantomons → 20% stats

This means your collection still matters even if certain Fantomons are not actively deployed.

Always Put Your Strongest Fantomon In The Main Slot

This is extremely important.

Your main deployment slot should almost always contain:

• Mythic Fantomons first
• Then Legendary Fantomons

The main slot gives the highest stat conversion, so placing weaker pets there wastes overall combat power.

A lot of players confuse these systems.

The Fantomon providing your highest stats does not have to be the one joining you in battle.

This means:

• Main Fantomon = stat provider
• Combat Fantomon = active battle companion

Sometimes a Fantomon has amazing utility skills in combat even if its raw stats are lower.

Because of this, your combat choice and deployment choice may be completely different.

How To Level Fantomons

Fantomons are leveled using:

• Basic Treats

These are one of the most important pet resources in the game.

Best Ways To Get Basic Treats

You can obtain Treats from:

• Cart idle rewards
• Daily cart shop using Rolla
• Guild shop animals and plants

Because Treats are limited early on, resource management becomes very important.

Fantomon Resonance

Resonance is one of the best quality-of-life systems in Sword x Staff.

Instead of manually leveling every pet individually, the game uses your four deployed Fantomons to determine the level of your entire collection.

How Resonance Works

The lowest level among your four deployed Fantomons becomes the Resonance Level.

For example:
If your four deployed Fantomons are:

• 130
• 129
• 127
• 132

Then every other Fantomon you own is treated as:

• Level 127

This system saves an enormous amount of resources.

Keep Your Top Four Balanced

Because Resonance uses the lowest deployed level, you should avoid heavily overleveling only one pet.

A balanced setup gives much better value overall.

Instead of:

• One level 150 pet
• Three level 90 pets

You usually want:

• Four similarly leveled Fantomons

This maximizes resonance efficiency.

Aptitude

Aptitude is essentially the Fantomon skill tree system.

Each Fantomon has its own progression tree that grants:

• Bonus stats
• Additional power
• Better scaling

These upgrades affect both:

• The Fantomon itself
• Your character stats

Aptitude materials are limited.

Because of this, you should generally invest only into:

• Your four deployed Fantomons

Spreading resources too thin slows progression significantly.

The good news is that Aptitude can be reset later if you decide to switch pets.

So experimenting is much safer than many players think.

Fantomon Evolution

Evolution is where Fantomons become truly powerful.

Once evolved, a Fantomon gains:

• Materialization form
• New active battle skills
• Additional combat effects

This dramatically increases their usefulness during difficult content.

Requirements To Evolve A Fantomon

To evolve a Fantomon, you need:

• Level 108
• Access to Nimbuville
• Mythic rarity
• A duplicate copy of that Fantomon

This is why duplicate planning matters so much.

Materialization

During battle, your Fantomon slowly builds energy.

You can see this through the rings around its icon.

Once fully charged:

• The Fantomon materializes into battle form

While materialized:

• Active combat skills become available
• Stronger battle effects activate

If the Fantomon faints:

• Energy resets
• It returns to assist form

Assist Skills vs Battle Skills

Before materialization:

• Only assist skills work

After materialization:

• Only battle skills activate

This creates an interesting combat flow where evolved Fantomons shift roles during longer fights.

In difficult content, properly evolved Mythic Fantomons can completely change how battles play out.