Why don’t the Cadaver Collector, Eladrin, Skull Lord, Sorrowsworn, Steel Predator… have save proficiencies?

At what point in Mordenkainens timeline did he go to Barovia?

Is the new hippo race pronounced Giff or Jiff?

Zariel “Horrid Touch” mentions making a saving throw but gives no DC

Star Spawn Hulk, shouldn’t the RAW of Psychic Mirror be “each creature other than a star spawn hulk”?