Is the Xanathar in Death Masks the same beholder in Dragon Heist? Oh, yes. The holder of the office did not change. DEATH MASKS takes place in 1491 DR, and DRAGON HEIST in 1492 DR; not all that much time passes between the two (and I included quite a few things in MASKS to "set up" Wizards game releases).#Realmslore

— Ed Greenwood (@TheEdVerse) July 4, 2020