Vrylaska Fellbranch

Vrylaska Fellbranch was a vampire who assassinated Warmaster Mikael Daxio.

In the adventure Frozen Blood in the Critical Role: Tal'Dorei Campaign Setting sourcebook, set in 812 PD, Vrylaska masqueraded as General Kay Clearsight at Fort Daxio to carry out the assassination. According to Temmik Lars, the only witness to the murder, Daxio was stabbed through the heart with a dagger of frozen blood, and his body was found on the bottom floor of the Watchman's Rest, a popular pub at Fort Daxio.

In the adventure Vampire Hunters in the Tal'Dorei Campaign Setting Reborn, set in 836 PD, the Daxio Outriders are said to have been looking for Fellbranch for years without luck, until reports of vampire attacks in the Cliffkeep Mountains draw the defenders of Fort Daxio out.

Abilities
Both sourcebooks recommend the vampire statblock found in the Dungeon Master's Guide or the Basic Rules for Vrylaska, conferring on her the statistics, traits, and abilities of a typical D&D vampire.