Critical Role has shed light on the design work behind one of the most tragic moments in its ongoing fourth campaign, in which brothers Teor and Cyd Pridesire were killed while exploring the ancestral home of House Tachonis, Obrimus Manor. The Dungeons & Dragons actual-play series, run by Dungeon Master Brennan Lee Mulligan, has set a consistently bleak tone across the new world of Aramán, and the deaths in episode 30, "Here in the Dark", came after several poor dice rolls by player Travis Willingham as the group uncovered an undead monstrosity in the manor's mortuary. The revelations, shared through The Lore Keeper's Ledger, highlight the craft that underpins the show's storytelling.

The insights come from a conversation between Lore Keepers Dani Carr and Jared Deiro and Critical Role's map-maker, Keo Lacebal, published in the exclusive monthly newsletter for Beacon members. Lacebal explained that although viewers saw only three maps of Obrimus Manor — the crypts, the aviary and the mortuary — a total of eight were created. To reflect House Tachonis' mastery of necromancy and its ties to the underworld of the Tenebral Reaches, Lacebal used a muted palette of greys and browns with occasional splashes of bloody red and necrotic green, alongside skulls, skeletons and deep purples. The mortuary, described as a "bloody chamber", was deliberately filled with more skeletons than the above-ground aviary, which Mulligan then brought to life with his descriptions and undead threats.