3. The castaways discover the unprecedented power of the Super Idol.
In Episode 8, Tai made a surprising announcement to the entire tribe; this season, there was a Super Idol, which allowed one (or more) castaway(s) to put two separate Hidden Immunity Idols together and form this super-sized advantage that gave said player(s) the upper hand to save someone after the votes were read at Tribal.
This was a surprise twist for some of the castaways, like Julia, who didn't know anything about this unprecedented power. However, the real question was whether or not someone would put the Super Idol to use.
Watch the Tribal Council from "The Jocks Vs. The Pretty People."