Zombie juice

Zombie juice was a foul-tasting disgusting concoction that went down hard but made everything else less painful in comparison.

Powers
However unpalatable these drinks were, they increased imbibers' resistance to all harm, mundane and magical.

History
In the mid-to-late-15 century DR, these horrific drinks became available during the extended celebration of Liar's Night, extended into grand Masquerade of Liars by the order of Lord Neverember.

Appearances

 * Video Games
 * Dungeons & Dragons: Heroes of Neverwinter