Practically nothing can destroy a lightsaber and there's almost nothing that a lightsaber can't deflect or penetrate. Interestingly, as shown a few times in The Mandalorian season 2, there's some material that can withstand a lightsaber blade - Mandalorian beskar, for one.
A lightsaber could cut through virtually anything, from flesh to blast doors. The only ways to block the incoming attack of a lightsaber was with a weapon made with material that conducted energy, such as an electrostaff, a Z6 riot control baton, some rare metals like beskar, or another lightsaber.
Dr. Kaku thinks we probably could if we build a lightsaber blade with hot plasma heated to around 12,000°F, contain it on a ceramic rod with an electromagnetic coil, and power everything using trillions of nanobatteries. The technology necessary to create Dr. Kaku's version of a lightsaber does not exist—yet.
It's doubtful a lightsaber would pierce Hulk's skin, and even if it could, Vader would have to get close to use it and it would probably take a while. Even a Force choke wouldn't work against the Hulk, as he can hold his breath for a very long time.
The only possible way for a lightsaber to harm Superman would be if the crystal powering the lightsaber were made of Kryptonite. However, that would still credit the Kryptonite crystal, not the actual lightsaber. Unfortunately for any Force sensitive that encounters the Man of Steel, Superman wins.
The Forbidden Forms were forms of lightsaber combat used by the Sith during the Sith Wars. According to the testimonies of the Jedi Cervil the Uncanny, lightwhips—a lightsaber variant with a flexible blade—were used to defend against Sith Lords who utilized the forms.
While the exact temperature of a lightsaber remains a subject of speculation, it's clear that this iconic weapon would be incredibly hot, with temperatures likely exceeding 20,000 degrees Celsius.
Lightsaber Blades Are Hot Enough To Cauterize Any Injury
This extreme temperature explains why lightsaber blades don't cause bleeding; lightsabers generate more than enough heat to cauterize a wound on impact. Cauterization is what happens when tissues (and by extension blood vessels) get melted by heat.
No, lightsabers can't block bullets. Here's a great video that explains why. The idea was actually put into issue #18 of the Dark Lord of the Sith comic series. During the hunt on Chandar's Folly, Tarkin's team armed up with slugthrowers (firearms) and flamethrowers, two things Vader couldn't block with his lightsaber.
Cortosis-weave armor was an armor which was resistant to lightsabers. It contained traces of cortosis, an ore prized for its ability to create an energy feedback loop which would temporarily shut down a lightsaber.
Beskar, also known as Mandalorian iron or Mandalorian steel, was an alloy that was used in Mandalorian armor and was notable for its high tolerance to extreme forms of damage. In its purest forms, the metal was durable enough to withstand a direct blaster shot and could repel lightsaber strikes.
A lightsaber can cut through the Vibranium shield if the Jedis have enough time to slowly cut it down. This is highly unlikely if a duel between Luke and Captain America occurs. Captain America will not give him enough time to cut through the shield.
Mace Windu's purple lightsaber is a rare and powerful symbol within the Jedi Order. The purple blade, a mix of light and dark, represents Windu's mastery of both sides of the Force and his creation of the Vaapad combat form. His lightsaber is not just a weapon but a symbol of his wisdom, strength, and balance.
Black lightsabers are extremely rare in the Star Wars universe, and only a few have been seen on screen. These lightsabers are typically associated with the Dark Side of the Force and wielded by Sith or Dark Jedi. The most well-known black lightsaber is the Darksaber, which was created by the first Mandalorian Jedi.
The black lightsaber, or Darksaber to give it its proper name, is one of the rarest lightsabers in Star Wars canon. Despite its rarity in canon, anyone who has seen the second season of The Mandalorian is likely to be familiar with the Darksaber.
Jackson joined the Star Wars prequel films, he made an unusual request to George Lucas. He wanted his Jedi, Mace Windu, to have a unique purple lightsaber. Lucas initially refused, insisting lightsabers came in only three colors - blue, green, and red - but eventually relented.
"Adegan crystals, as well as Corusca, Ilum, and others, are under strict trade and commerce interdiction, per the orders of Emperor Palpatine." "I'll grow one, then." With the Great Jedi Purge, lightsabers were outlawed.
However, a groundbreaking study conducted at the University of Leicester's Centre for Interdisciplinary Science challenges these long-held assumptions. The study suggests that, against all expectations, red lightsabers may actually be the weakest of the lot.
