Which mobs will eliminate Kai or Speed?

Kai Cenat and IShowSpeed are scheduled to stream a hardcore Minecraft marathon on August 7, 2026, at 5:00 PM ET, in which they will attempt to defeat the Ender Dragon, the Wither, the Warden, and the Elder Guardian in a hardcore Minecraft world on Java Edition, on the same seed, without either player dying in-game. For the purposes of this market, "the marathon" refers to Kai and Speed's Minecraft stream beginning on that date and continuing until they conclude or abandon it. This market will resolve to "Yes" if a death message containing the specified mob's name is displayed for either Kai …