Best William I Immortal Guide: Skills, Pairing and Equipment

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Are you looking for the best cavalry immortal to lead your team? Meet William I, he is one of the best fire immortals in Infinity Kingdom thanks to high damage output and provides excellent friendly buff that boosts your immortal team’s combat performance.

In our complete William I immortal guide, we will talk about best passive skills, equipment and pairings to go with this immortal. By following this guide, you will learn what it takes to turn William I into one of the best fire immortals in the game. Without further ado, let’s get the ball rolling and find out!

William I Immortal Infinity Kingdom

William I | Title: William the Conqueror
Troop Type: Cavalry| Attribute: Fire| Position: Attack
Rarity: Epic

William I Pros & Cons

Here’s a list of pros and cons of having William I on the team.


  • Superior damage output.
  • Increased critical rate chance.
  • Versatile.
  • Very popular immortal.
  • Good passive skill synergy.
  • Beats wind element.


  • Vulnerable to magical damage.

William I Introduction

William I Immortal Guide IK

William I is a physical attacker in Infinity Kingdom and specializes in cavalry troops. He have an incredible strong active skill called Skyfire that deals damage directly ahead of him and increases critical rate chance for all allied units. Whenever you need a powerful attacker that can provide additional damage output, William I excels in this area.

In order to summon William I in the game, Lords can obtain fragments by performing advanced summons in Hall of Immortals, purchase fragments through Market and in the Mysterious Shop. Once you obtain enough fragments, you can summon William I to join your team.

William I Skill

Learn more about the active skill and recommended passive skills.

Active Skill: Skyfire

Skyfire William I Skill Infinity Kingdom

William performs a powerful sweeping physical attack that inflicts damage to the targets directly ahead of him. Upon dealing physical damage, William I grants increased critical rate chance to all friendly units for a few seconds.

Upgrade Preview:

  • Damage Rate: 135% / 180% / 225% / 270% / 315% / 360% / 405% / 450%
  • Critical Rate Chance: 6% / 8% / 10% / 12% / 14% / 16% / 18% / 20%

Skyfire: This is an incredible strong active skill that does a ton amount of physical damage. At the same time, all of your immortals will gain increased critical rate chance that goes nicely with support immortals and passive skills that are dependent on this stat modifier.

Recommended Passive Skills

Since William is a close melee physical attacker, it is highly recommended that you focus on passive skills that increases his physical damage. In addition to that, you will want to take advantage of increasing his attack speed so that he can maximize overall damage through dealing critical hits. William I is an epic immortal and can have up to three passive skills at a time.

  • Anger: Increase physical damage by 30% (Passive).
  • Cleave: Deals extra damage to random targets.
  • Berserk: Increases units attack speed.
  • Speed Blessing: Increases your troops attack speed.
  • Rage: Increase critical rate chance.

Best Immortal Pairing for William I

Thanks to William I’s active skill, he is in an unique position that makes him a popular choice with these immortals. As always, we recommend pairing William I with fire immortals to gain element affinity stat bonuses. Below is our recommended fire immortals for best damage output and improved combat strength on the battlefield:


Edward Immortal Infinity Kingdom

One of the best fire immortals to pair with is Edward. He comes with an active skill that increases his troops’ physical damage and attack speed by 40% for a few seconds. Through combination of William I and Edward, the improved critical rate chance means Edward will be able to deliver even more damage.

If Edward have passive skills that causes additional damage through normal attacks, he will be able to benefit from it thanks to increased critical rate chance and attack speed. The William I and Edward is a very good immortal pairing to have on the same team. Be sure to have both in your team.


Ashoka Immortal IK

Alternatively, you can switch Edward for Ashoka if you want to further increase your immortal team’s overall damage output. He can fire a powerful arrow that does a lot of damage. Plus there is a chance for his active skill to deal double damage. However, Ashoka’s active skill is very capable of dealing even more damage through improved critical rate chance thanks to William I.

This means Ashoka have the potential to deal 1,680% physical damage per target with his active skill. Against all the enemy targets that would bring his overall damage output to roughly 6,720% each time he activates his active skill — only if he is lucky enough to deal double damage and that it critically hits the targets.

Cyrus the Great

Any skilled Lords know how important it is to have a support immortal on the team. If you are looking for an immortal that can provide much needed support to your team at the same time taking advantage of William I’s improved critical rate chance buff. Then you will want to have Cyrus the Great on the team.

He comes with an active skill that reduces enemy targets’ resilience rate. Furthermore, he makes the enemy targets prone to getting stun from being critically hit. Which means your immortals will have good chance to stun the enemy targets whenever they deal critical hit. Overall, a nice support immortal to have on the team.

Frederick I

Frederick I Immortal IK

While William I is a good physical attacker to have on the team, he will definitely need another physical attacker that can absorb incoming damage. This is where Frederick I comes into the play. He boasts a solid active skill that does immense damage towards multiple targets. Then 30% of that damage is converted into health, restoring Frederick I.

The damage-health conversion gives this epic immortal a combat advantage of dealing damage and replenishing what is lost. However, he stands to benefit from improved critical hit chance that William I has to offer. By dealing even higher damage, Frederick I will be able to restore even more of his lost health. It’s the perfect paragon here.

Empress Wu

Empress Wu Immortal IK

If you want to spice up your immortal team a bit with some magical damage. Empress Wu is a powerful fire immortal that will make a good addition thanks to close synergy with William I’s critical rate chance buff. This fire immortal deals magical damage with her active skill, which has a chance to inflict additional magical damage to a random target three times for 600% damage each time.

With the 20% increased critical rate chance, Empress Wu have chance to inflict even more lethal magical damage against enemy targets that are not well equipped to protect against magical spells. Overall, Empress Wu is a good fire immortal that can make a quick work out of enemy immortal teams that are heavy on physical stats.


Hippolyta Immortal IK

Another solid physical attacker that is worth pairing with, Hippolyta, Queen of the Amazon. Her active skill allows this fire immortal to hit a random target multiple times. With William I’s critical rate bonus, Hippolyta will be able to deal even more damage as her hit will have higher chance to land a critical hit.

In addition to that, this fire immortal will lower enemy target’s attack speed by 10% and that stacks up to 6 times. The attack speed reduction helps a lot for William who will need to be able to provide consistent amount of damage. Slow-hitting enemy targets means less incoming damage for your team and that’s where Hippolyta excels in this role.

Best Equipment for William I

Here’s a list of best equipment to wear for this immortal:

Aranse's MedalAranse’s MedalOffhand
Aranse's ArmorAranse’s ArmorChest
Aranse's BarbuteAranse’s CrownHead
Aranse's GreatswordAranse’s GreatswordMain Hand

Conclusion of William I Immortal Guide

Best William I Immortal Guide Infinity Kingdom

Whether you are looking for the perfect fire immortal team or ways to counter them in Infinity Kingdom. William I is one of the most powerful fire immortals and a considerable versatile unit in the game due to improved critical rate chance buff. Any Lords specializing in fire element will always want to have this immortal on the team.

Lastly, if you like to get free gems, speedups, resources and freebies. Visit our Infinity Kingdom codes guide (we update frequently and there’s so many freebies)! Start collecting goodies and get a headstart in the game!

Did you find our best William I immortal guide helpful and informative? If you have any questions about this fire immortal or think we should add something to this guide, let us know by commenting in the comment section below.

Happy ruling, Lords!

Best William I Immortal Guide: Skills, Pairing and Equipment
Best William I Immortal Guide: Skills, Pairing and Equipment

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