Is there any way to attain Expertise (i.e. a doubled proficiency bonus) with a Poisoner's Kit?

My character is a Rogue, so I have the proficiency already, but I want to have Expertise with this tool if possible.



An Aereni elf (WGtE, p. 73) chooses one skill or tool to gain double proficiency in at first level.

An Unearthed Arcana: Races of Eberron changeling (p. 2) can do similar, gaining double proficiency with a specific tool in a specific persona, as well as the Envoy Warforged (p. 9 ibid.) via a specific integrated tool.

An Eberron: Rising from the Last War changeling (p. 18) cannot, however, nor can the warforged (p. 36) in that source.

  • \$\begingroup\$ Thank you @Pleasestopbeingevil for letting me pick your brains - this is really helpful. \$\endgroup\$
    – Senmurv
    Jan 4 '20 at 0:37
  • 4
    \$\begingroup\$ @NautArch: Originally, WotC never used "expertise" as a mechanical term, just as the name of the bard and rogue features that granted a doubled proficiency bonus in a skill or tool; other instances of doubled proficiency bonus simply referred to the doubled proficiency bonus itself. (The community did often use "expertise" like a mechanical term to refer to any source of doubled proficiency bonus nevertheless.) Then Xanathar's treated like it was a mechanical term when it used it in the Prodigy human racial feat and in the skill empowerment spell, repeating the definition alongside it. \$\endgroup\$
    – V2Blast
    Jan 4 '20 at 6:41

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