Anakin Skywalker/Darth Vader lost his right hand to Count Dooku on Geonosis in Attack of the Clones. He lost the replacement cybernetic on Nelvaan in the Clone Wars micro-series (Legends). He lost his left hand and both legs to Obi-Wan Kenobi on Mustafar in Revenge of the Sith.
Vader lost the fight after having both legs and his left arm severed by Kenobi. Vader then tumbled down the volcanic planet's surface, near a river of lava, where his robes burst into flames, consuming his entire body. Kenobi left his former apprentice for dead.
Once in Attack of the Clones while fighting Count Dooku, once in Revenge of the Sith while fighting Obi-Wan on Mustafar (may have spelt that wrong) where all his limbs were cut off and one more time in Return of the Jedi when Luke cut off his hand.
How Much TOTAL Power Did Anakin Lose Compared to Sidious After Mustafar? - Star Wars Explained
Why did Darth Vader cut off Luke's hand?
Vader presumedly wanted to give Luke the experience of pain during his attempt to get his son to join him, thereby making him more vulnerable to the dark side's power. For Vader, pain is his greatest tool and asset, as it ultimately gives him the power to wield the dark side of the Force.
For the Jedi, the use of dismemberment in lightsaber combat was to end a battle without resorting to killing the opponent. Collectively, the Jedi techniques to dismember an opponent rather than killing them was called a severing strike. Luke Skywalker's prosthetic hand.
When tallying up the lightsaber losses, Obi-Wan Kenobi lost his blade a total of 12 times between the events in the prequel films and The Clone Wars. In contrast, Anakin lost his only eight times.
Count Dooku was not sad after cutting off Anakin's arm in Episode II: Attack of the Clones (AOTC). He was ready to kill Anakin, and only the entrance of Yoda spared the Jedi's life.
Darth Vader lost his left arm and both legs when Obi-Wan Kenobi defeated him on Mustafar. Skywalker later dueled his former Jedi Master Obi-Wan Kenobi and lost both legs, as well as his left arm.
Darth Vader's loss of limbs prevents him from using force lightning, a common ability among Sith, making him weaker in comparison. Vader's reliance on his mechanical suit weakens him in battle, reducing his agility and mobility from his days as Anakin Skywalker.
Obi-Wan Kenobi soundly defeated Vader in Star Wars: Episode III - Revenge of the Sith and Obi-Wan Kenobi, and is easily one of the most powerful Jedi Vader ever faced.
Dooku and Yoda have had a long history. Master Yoda trained him, but Dooku also trained Qui-Gon Jinn, Obi-Wan's master. The lineage of master and apprentice runs deep, and it was Dooku's fall to the Dark Side that hit Yoda very hard.
In a galaxy filled with lightsabers of various colours, the Darksaber stands out as the rarest lightsaber colour, shrouded in mystery and steeped in history. Created by the first Mandalorian Jedi, it has passed through the hands of warriors, terrorists, and heroes, leaving an indelible mark on the Star Wars universe.
This explains why Rey could hear the lightsaber "calling" to her in Star Wars: The Force Awakens; she was destined to join herself to the same Skywalker legacy, and thus she was sensing echoes of Anakin and Luke beckoning her to them.
Parents debate. Some fans have speculated Rey to be either the daughter of Luke Skywalker and another woman or daughter of Han Solo and Leia Organa, therefore the sister of Kylo Ren. She would also be the granddaughter of Anakin SKywalker and Padme Amidala.
After Anakin Skywalker fell to the dark side and became Darth Vader in Star Wars: Episode III - Revenge of the Sith, he and Obi-Wan Kenobi had their climactic battle on Mustafar that resulted in Vader losing all his limbs and suffering severe burns throughout his entire body.
All things considered, it seems as though Ahsoka intentionally made the decision to not use both her lightsabers likely because the shorter shoto wouldn't have been as effective. An extended duel with Marrok and his fully ignited lightsaber likely necessitated Ahsoka to change tactics.
