Add a griffin monster with the following statblock:

• Difficulty 14, base level 11, speed 24, 10 points of natural AC.
• 10 monster magic resistance.
• Neutral aligned.
• Medium sized.
• Has a 2d6 physical claw and a 1d8 physical bite attack.
• Counts as an animal.
• Omnivorous.
• Oviparous.
• Flies, and can be saddled and used as a steed.