Editing David Ellefson (section)

===Post Megadeth projects (2021–present)===
[[File:ExMegadeth David Ellefson InterviewKings of Thrash Ellefson Soto Megadeth Canadian Metal720p.webm|thumb|right|Ellefson in 2022]]
Following his departure from Megadeth, Ellefson formed a new band named [[The Lucid]]. With Ellefson on bass, the band also consists of drummer [[Mike Heller]] ([[Fear Factory]], [[Malignancy (band)|Malignancy]]), guitarist [[Drew Fortier]], and vocalist [[Vinnie Dombroski]] ([[Sponge (band)|Sponge]], [[Spys4Darwin]]). Between September and October 2021, the band released three singles; "Maggot Wind", "Damned", and "[[Hair (The Lucid song)|Hair]]".<ref>{{Cite web|date=October 6, 2021|title=David Ellefson's Post-Megadeth Project the Lucid Releases Third Single, 'Hair'|url=https://www.blabbermouth.net/news/david-ellefsons-post-megadeth-project-the-lucid-releases-third-single-hair/|access-date=October 6, 2021|website=blabbermouth.net}}</ref> Their self-titled debut, [[The Lucid (album)|''The Lucid'']], was released on October 15, 2021.<ref>{{Cite web|title=David Ellefson Returns With His First Post-Megadeth Project the Lucid|url=https://blabbermouth.net/news/david-ellefson-returns-with-first-post-megadeth-project-the-lucid/|access-date=September 8, 2021|website=Blabbermouth|date=September 8, 2021 |language=en}}</ref>

In January 2023, the Lucid released their sophomore effort, a five-track EP titled [[Saddle Up and Ride (The Lucid EP)|''Saddle Up and Ride'']].<ref>{{Cite news |date=December 23, 2022 |title=WTF?! Hear David Ellefson Team With ICP's Violent J on New Lucid Song |language=en |work=Revolver |url=https://www.revolvermag.com/music/hear-former-megadeth-bassist-david-ellefson-team-insane-clown-posses-violent-j-new-song |access-date=March 20, 2023}}</ref> The EP includes a guest performance from [[Insane Clown Posse]] vocalist [[Violent J]] on the title track as well as a cover of [[Faith No More]]'s "[[Epic (Faith No More song)|Epic]]" retitled as "Sweet Toof".<ref>{{Cite news |title=How Violent J From Insane Clown Posse Ended Up On A Couple Songs With Vinnie Dombrowski From Sponge And Ex Megadeth Bassist David Ellefson|url=https://wrif.com/listicle/how-violent-j-from-insane-clown-posse-ended-up-on-a-song-with-vinnie-dombrowski-from-sponge-and-ex-megadeth-bassist-david-ellefson/ |access-date=March 20, 2023 |website=WRIF Rocks Detroit |language=en}}</ref> Between December 2022 and January 2023, four singles from the EP were released; "Saddle Up and Ride", "Mumps", "Risk Machine", and "Sweet Toof".<ref>{{Cite web |last=Kennelty |first=Greg |date=January 20, 2023 |title=THE LUCID & INSANE CLOWN POSSE's VIOLENT J Reimagining FAITH NO MORE's "Epic" Is Something|url=https://metalinjection.net/new-music/the-lucid-insane-clown-posses-violent-j-reimagining-faith-no-mores-epic-is-something |access-date=March 20, 2023 |website=Metal Injection |language=en-US}}</ref>

In 2022, Ellefson formed the death metal band Dieth with Guilherme Miranda on guitar and vocals and Michał Łysejko on drums. The band released their first single, ''In the Hall of the Hanging Serpents'', on July 13, 2022. The band released three more singles and their first album ''To Hell and Back'' in 2023. Song ''Walk With Me Forever'' from the same album marks Ellefson's first time in his career singing lead vocals.

In 2022, Ellefson formed the band Kings Of Thrash with former Megadeth guitarist [[Jeff Young]]. The band plays songs from the first three studio albums of Megadeth live (and sometimes Mustaine-penned Metallica tunes, such as "[[Jump In The Fire]]").<ref>{{cite web |title=DAVID ELLEFSON Reunites With Early MEGADETH Guitarist GREG HANDEVIDT For 'Jump In The Fire' Performance In Minneapolis|url=https://blabbermouth.net/news/david-ellefson-reunites-with-early-megadeth-guitarist-greg-handevidt-for-jump-in-the-fire-performance-in-minneapolis |website=[[Blabbermouth]] |access-date=August 5, 2023 |date=February 18, 2023}}</ref> They had former Megadeth guitarist [[Chris Poland]] as a guest on their ''The MEGA Years'' tour in 2022. In February 2023, the group also played shows with an early guitarist for Megadeth, Greg Handevidt.<ref>{{cite web |last1=Daly |first1=Andrew |title="I'd hear Dave Mustaine aimlessly riffing on the couch, and it's the riffs that ended up on the first two Megadeth – and, frankly, Metallica – records": Megadeth's first lead guitarist Greg Handevidt on the birth of a metal institution|url=https://www.guitarworld.com/features/megadeth-greg-handevidt |website=Guitar World Magazine |date=August 2, 2023 |access-date=August 4, 2023 |quote="I actually did a quick show with Kings of Thrash back in February, which was an absolute blast," Handevidt explains of his involvement with the group. "Beyond that, it's a whole lot of maybe. I've been talking with David Ellefson for the last eight or nine months about doing something, and we're planning on putting something out by the end of the year. But that's about all I'm gonna say about that right now. If David wants me to do more, I'd be up for it."}}</ref>

In April 2024, Ellefson fillied in for bassist [[D.D. Verni]] on [[Overkill (band)|Overkill]]'s Latin American tour when Verni was unable to perform as he was recovering from shoulder surgery.<ref>{{cite web|url=https://blabbermouth.net/news/david-ellefson-to-play-bass-for-overkill-on-2024-latin-american-tour|title=DAVID ELLEFSON To Play Bass For OVERKILL On 2024 Latin American Tour|website=[[Blabbermouth.net]]|date=March 11, 2024|accessdate=March 11, 2024}}</ref><ref>{{Cite web |last= |date=2024-04-12 |title=Watch: Ex-MEGADETH Bassist DAVID ELLEFSON Performs With OVERKILL For First Time |url=https://blabbermouth.net/news/watch-ex-megadeth-bassist-david-ellefson-performs-with-overkill-for-first-time |access-date=2024-12-03 |website=BLABBERMOUTH.NET |language=en}}</ref>