While it's sometimes fun to flip open a bestiary or monster manual to find a random monster to throw at the PCs, when you're planning a boss for your party to face, it's best to put some thought and care into the selection. You might even go so far as to make the boss of the adventure a full-fledged and statted-out NPC using the typical character creation rules instead of relying on the sparse monster stat block in the book. How much prep you put into the boss is up to you, and is, quite hone...
