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I'd hate to be that guy, but Deltarune has a Character named "Rouxls Kaard"

Just sayin'

card-KCAH

Allows you to play SNaS before it's full release!

Grants you some perks in many different Overcastle decks

Let's you activate Mess, Pesticide, Snitch, Renew, Sevgili and Bob outside of the month of May. 

Allows you to activate April Fools animatronics outside of the month of April.

Let's you playtest a future update before it's release!

Gives you access to play the game before it's actual release! 