Theres a base-level thrum of excitement with every single draw of a card or token in Arkham Horror because theres always a chance that this is the moment where things start going wrong for you, and the consequences for failure are occasionally laughably cruel
The ability to bring the exiled creature it might push out of graveyard back to play for a turn puts it on the list, doing a decent Puppeteer Clique impression
Strong removal suite Access to [card]Galvanic Blast[/card], [card]Cast Down[/card], and more
You basically cant attack into it, for risk of flipping your opponent into whats likely to be their best card, though you cant always stop them from feeding the Rector to a sacrifice outlet
Design[] Thematically, the "Labrynth" consist of a silver palace and its inhabitants, which are either mimics of various ornaments (chandelier, grandfather clock and stove respectively), or people of various positions within a hierarchy