Challenge Rating (CR)

A creature's Challenge Rating provides a rough measure of the creature's toughness in a combat situation. As a rule of thumb, four heroes of a level equal to the creature's Challenge Rating should exhaust roughly one-quarter of their resources battling it. But situations may arise where a creature's Challenge Rating does not accurately reflect the difficulty of the challenge.
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Level Adjustment And Challenge Rating
Rating (Cr) d20 (Cr) wizards roleplaying Rating 3.5 MRD wizards wizards Challenge Challenge Overview modern rpg msrd 3.5 Overview Rating roleplaying 3.5 mrd modern Creature srd modern roleplaying Challenge Creature wizards mrd rpg srd MRD msrd (Cr) Rating