For your Dungeons & Dragons session, I can suggest a cocktail that aligns well with the adventurous and mythical atmosphere you’re aiming for, even though our list doesn't mention mead directly. However, since your basis is vodka, let's look at a cocktail that could bring a touch of medieval fantasy and intrigue—notably the "Joffrey's Poison."
The "Joffrey's Poison" contains vodka, aligning with your requirements. Its blend of tart lemon juice, deep fruitiness from blackberries, the rich touch of port, and spice from cloves and ginger syrup creates a complex, layered flavor that feels both rich and adventurous. The name and theme fit a D&D session, conjuring images of medieval courts and the intrigues of a fantasy world. While it doesn’t include mead, its multifaceted taste could complement the atmosphere and could easily be paired with separate servings of mead.
If you need the mead specifically included in the cocktail itself, it may be worth experimenting a bit. You could potentially use the "Joffrey's Poison" as a starting point and add a mead-based twist for that authentic touch. Enjoy your session!