Seethyr
Magen, Caldron from The Piazza posted 30 September 2020.
Magen, Scalos from The Piazza posted 30 September 2020.
Sollux as a playable race in 5E from The Piazza posted 15 May 2022.
Diabolus as a playable race in 5E from The Piazza posted 25 May 2022.
Sky Wyrm: page 1, page 2 (including Lesser Sky Wyrm and Greater Sky Wyrm) from The Piazza posted 28 June 2022.
From the journal of Cobbler Gleason from The Piazza posted 29 June 2022.