When he landed on the first pillar, he was given an extremly complex matrix he had to decipher.
It was a twelve sided crimson die like matrice covered in runes that appeared within his mind.
It relied on the conceptions of causality and paradoxal conundrums that interweaved and webbed to form a complex mind puzzle where any wrong move would seal the person's fate, a life of madness and foolishness only awaiting them afterwards.
[A/N: In simple words, if they fail they become brain dead.]
With Orion's hyper focused state, he'd immediately found a solution as soon as he saw the complexity and danger associated with it.
He took one of his split minds and permanently severed it from the main streams of minds he had then branded a few runes onto it before he sent it into the maze.