He already knew what they were from the game… the moment Sylvia had become lovers with Reinhardt in the original storyline, she had asked him to follow her into the trials, and that was how the player learned everything.
Back then, the trials were presented as a series of events designed by the Elf King to test not only the strength, but the intellect, diplomacy, adaptability, and judgment of the soon-to-be Elf King.
Even though, in the game, the Elf King had spoken of retirement, it never actually stepped down until the day it died… right as the Children of the Sky descended onto Earth, marking the beginning of one of the worst calamities in the records.
Which meant, in reality, most of these tests were merely ceremonial, designed to fulfill expectations rather than to determine an immediate succession.
Besides, no two Elf King Trials were ever the same.
