Celestials include angels, couatls, and pegasi. Celestials are good by nature, so the exceptional celestial who strays from a good alignment is a horrifying rarity. Many of them are the servants of deities, employed as messengers or agents in the mortal realm and throughout the planes.
Keep in mind that modifying a monster, including when you apply a template to it, might change its challenge rating. Feel free to tweak an existing creature to make it into something more useful for you, perhaps by borrowing a trait or two from a different monster or by using a variant or template, such as the ones in this book. Modifying CreaturesDespite the versatile collection of monsters in this book, you might be at a loss when it comes to finding the perfect creature for part of an adventure. Table: Size Categories shows how much space a creature of a particular size controls in combat. SizeA monster can be Tiny, Small, Medium, Large, Huge, or Gargantuan. A monster’s statistics, sometimes referred to as its stat block, provide the essential information that you need to run the monster.