sixtraxlota

sixtraxlota is a drinking game traditional to lizardfolk, in which cups of a strong booze are given to every player to drink from.  One is poisoned with Skrata, a powerful hallucinogenic substance which can induce vomiting almost immediately after consumption.
The game is played in rounds.  First, roll based on the number of players to see who receives the poison cup (it is always given to somebody).  Then, everyone rolls constitution saves.  Players are eliminated either:

• By failing three non-poisoned CON saves
• By failing any poisoned CON saves

DC is 10+round number for non-poisoned cups, or 16+round number for poisoned ones.  Last standing wins.