Converting Forgotten Realms monsters

[Cleon]

Since this is like a Gray Render (CR 8), with many improvements, then i assume that even CR 13 might be too high. Its too hot here, i am sweating buckets.

I'd eyeball it as somewhere around CR 10, but Challenge Ratings are not an exact science.

 

[Cleon]

Special Qualities: Damage reduction 10/magic, SR 17, regeneration 5, immunities, Darkvision out to 60 feet, low-light vision

Noticed a minor error, the "Darkvision out to 60 feet" shouldn't have the "out to".

Just "darkvision 60 ft." is the normal format.