One of my more memorable board game experiences was with Spectre Ops.
Boy was that intense! But in the best way a board game can be. It's not a "gateway" type but if you're into MTG (which I also play) you will definitely enjoy this.
Some of my go-to faves in no particular order:
King of Tokyo
Betrayal at House on the Hill
Ticket to Ride
Epic Spell Wars
... and so many, many, many more, lol. Welcome to this side of nerdom!