Beholder 14-2=12 It's not personal, I like everything on the list...this is just the one I like least.
Gelatinous Cube 13
Mind Flayer/Illithid 11
Owlbear 8 Rust Monster 12+1=13 Wipe the smile off those shiny, smiling, do-good paladin faces.
Beholder 14 - 2 = 12 If you need to create a Wizard-nullifying monster, your Wizard is designed too powerful compared to everybody else.
Gelatinous Cube 12
Mind Flayer/Illithid 9.
Owlbear 8 Rust Monster 11 + 1 = 12 If you are a DM, spread the love: introduce one of these into your next Intro to D&D mini-campaign. Rust Monsters WILL BE 'iconic' to the next generation!