Mick tries to justify himself, saying that if a member of the team goes bad, they have to bring him down. Ignoring of course the numerous times he went bad (and without being mind controlled, that is) including Marooned (2016), Left Behind (2016) and Fellowship of the Spear (2017) when the team did not give up on him.
The púca (Irish for spirit/ghost) is primarily a creature of Celtic folklore. Considered to be bringers both of good and bad fortune, they could either help or hinder rural and marine communities. Púcaí can have dark or white fur or hair.
As the king passes by with a creature being carried away, John Constantine ask Neron 'what kind of creature do you think are they're hunting', Neron replies, 'Can't be sure, but I'm guessing it wasn't a rabbit.' it references Monty Python and the Holy Grail, where after many misadventures come across a killer rabbit and kill this rabbit.
Nate is the second Legend to give a creature a name naming the unhatched baby dragon 'Wickstable', the first was Ray who named the smilodon 'Mr. Sneezums' in Freakshow (2017).
When the Legends seem doomed to slowly freeze to death beneath Donner Pass, Charlie asks who they'll be eating first, a reference to the Donner Party, a group of American pioneers who set out for California in a wagon train from the Midwest. Delayed by a series of mishaps, they spent the winter of 1846-47 snowbound in the Sierra Nevada. Some of the emigrants resorted to cannibalism to survive, eating the bodies of those who had succumbed to starvation and sickness.