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.

A unicorn (possibly “red unicorn”) that is unaligned - i.e. aligned to evil/Moloch. Unspecified if it would behave differently with respect to gems thrown at it.

Since polearms are designed for use against mounted enemies, they get bonuses versus all u and C monsters. Also mounted enemies, if in a variant that has monster riding.

Add pegasi, lawful u-class monsters that fly, have a slightly higher base level than a warhorse, and speed around 25. Might be tameable with vegetables, or only blessed vegetables, or one certain veggy food, though.