Warlock battles and magical swords are common themes in fantasy literature and role-playing games. These battles typically involve powerful warlocks or sorcerers who engage in combat using their magical abilities and weapons, often in an attempt to gain control over a specific territory or achieve a particular goal. The concept of warlock battles and magical swords adds an element of excitement and intrigue to these stories, as both warlocks and magical swords are often depicted as being imbued with extraordinary powers. Warlocks are generally portrayed as highly skilled and formidable fighters, with the ability to cast powerful spells and manipulate the forces of magic to their advantage. Similarly, magical swords are often portrayed as being enchanted or possessing other supernatural abilities such as the ability to cut through any material or inflict additional damage on enemies. These battles are often portrayed as epic showdowns between two powerful individuals or groups, with the outcome of the battle often having far-reaching consequences for the world in which the story takes place.
To begin we need to ask whether the Pact of Blade weapon is a magic weapon without benefitting from the Improved Pact Magic invocation. This answer says that it is not and therefore is not destroyed by an anti-magic field. The test for determining if something is magical is as follows:
Given that I ve concluded above that a weapon being a hex weapon doesn t change anything regarding what detect magic would pick up on, then the magical weapon s magic would not be altered by Hex Warrior in any way. Pact weapons would probably show up as magical, but as for the school, if there is one, that would be up to the DM; hex weapons wouldn t, unless the weapon is magical already.
These battles are often portrayed as epic showdowns between two powerful individuals or groups, with the outcome of the battle often having far-reaching consequences for the world in which the story takes place. The battles can be filled with dramatic moments, intense action sequences, and intricate strategies as the warlocks and their allies employ their magical abilities and weapons to outmaneuver and defeat their opponents. Furthermore, warlock battles and magical swords often serve as catalysts for character development and plot progression.
Pact weapons would probably show up as magical, but as for the school, if there is one, that would be up to the DM; "hex" weapons wouldn't, unless the weapon is magical already
These warlock class features call out these weapons as magical. From Pact Boon - Pact of the Blade (PHB, p. 107):
This weapon counts as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.
Whether this means that it is actually magical for the purposes of detect magic, this isn't clear, but this gives a DM something to work with to make a ruling. I'd personally rule that the pact weapon is inherently magical, but that isn't explicitly stated in the text.
2. Magic weapon transformed to Pact of the Blade weapon (via the ritual), compared to before the ritual
As for your second point, the weapon that you transform into your pact weapon is explicitly called out as being magical before you do so (PHB, p. 108):
You can transform one magic weapon into your pact weapon by performing a special ritual while you hold the weapon.
Since it is already a magical item, it would show up as magical to detect magic, but it would have done before it became a pact weapon as well. Whether being a pact weapon has any impact on the school of magic it registers as would be up to the DM (see the last section of my answer for more on this).
3. Pact of the Blade's Improved Pact Weapon (eldritch invocation) and its created weapon with +1 to hit and damage
As for the Improved Pact Weapon invocation, we can turn to the general information on eldritch invocations (PHB, p. 107):
In your study of occult lore, you have unearthed eldritch invocations, fragments of forbidden knowledge that imbue you with an abiding magical ability.
That seems more clean cut to me; if an invocation is a magical ability, and the Improved Pact Weapon invocation affects the weapon, then the weapon is magical thanks to that invocation (at the very least, magical enough to show up as magical to detect magic, even if the magic being detected is the invocation, not the weapon).
However, this related question shows that not everyone views such as thing as so clean cut: Is a Warlock's Improved Pact Weapon considered a magic weapon?
4. Hexblade's chosen weapon, by touching a normal weapon after a long rest
The Hex Warrior feature of the Hexblade warlock says (XGtE, p. 55-56) doesn't mention magic at any point, so presumably the "magic" here is that you are more capable of using it that you "should" be, thanks to your eldritch magic, but the weapon itself appears to be no different. I would conclude that the weapon is nonmagical and you would get nothing from detect magic.
5. Hexblade's chosen weapon, by touching a magical weapon after a long rest, compared to before choosing it
Similar to the above, except that because the weapon in this case is already magical, it would show up as magical to detect magic, but no different than it would have done before the Hexblade got their hands on it. Given that I've concluded above that a weapon being a hex weapon doesn't change anything regarding what detect magic would pick up on, then the magical weapon's magic would not be altered by Hex Warrior in any way.
Regarding the School of Magic
At no point in any of the descriptions of these warlock class features is a school of magic mentioned, so if a DM were to wish to treat any of the above as magical for the purposes of detect magic, they would need to come up with a school of magic themselves, or conclude that there isn't one. For weapons that were already magical (as per #2 and #5), they might want to use that weapon for guidance, if it mentioned a school of magic, but to the best of my magic, most (all?) magic weapons don't typically do that, so once again, it's probably just up to the DM's judgement.
As for the Improved Pact Weapon invocation, we can turn to the general information on eldritch invocations (PHB, p. 107):
The battles can push characters to their limits, testing their skills, resolve, and loyalty. They can also reveal hidden depths and abilities in characters, as well as bring about unexpected alliances and betrayals. Overall, warlock battles and magical swords are powerful and captivating elements in fantasy stories that add depth and excitement. They provide opportunities for thrilling action sequences, intense emotional moments, and significant plot advancement. The concept of warlock battles and magical swords has become an integral part of the fantasy genre, captivating audiences with their awe-inspiring displays of power and the unknown possibilities they offer..
Reviews for "Mysterious Artifacts: The Ancient Magical Swords in Warlock Battles"
1. John - 2 stars - I was really disappointed with "Warlock battles and magical swords". It felt like the plot was incredibly cliché and unoriginal. The characters lacked depth and development, and the dialogue was cheesy and cringe-worthy. The whole concept of warlock battles and magical swords has been done to death, and this book added nothing new or exciting to the genre. Overall, I found it to be a bland and uninspiring read that failed to capture my attention.
2. Sarah - 1 star - I cannot express how much I disliked "Warlock battles and magical swords". The storyline was predictable and repetitive, following the same tired formula of other fantasy novels. The characters were one-dimensional and lacked any depth or complexity. To make matters worse, the writing style was dry and lacked any sort of imagination. The so-called warlock battles felt rushed and lacked intensity, and the magical swords were nothing but a cheap plot device. I was bored from start to finish and regretted wasting my time on this book.
3. Emily - 2 stars - "Warlock battles and magical swords" was a huge letdown for me. The world-building was weak, leaving me confused and disconnected from the story. The characters were forgettable and lacked any relatable qualities. The action scenes were poorly executed and failed to capture my interest. Overall, it felt like a generic fantasy book that offered nothing unique or compelling. I would not recommend this book to anyone looking for an immersive and engaging fantasy read.