Quickly identify the vital statistics of a single creature worth the provided experience points (XP) or Challenge Rating (CR). Uses the table provided in p. 274-275 of the Dungeon Master's Guide. Accepts Challenge Ratings of 0, '1/8', '1/4, and '1/2' in addition to numbers between 1 and 30. CR is *not necessary* to provide **if** XP is provided.
monster_stats(xp = NULL, cr = NULL)(dataframe) two columns and eight rows
(numeric) experience point (XP) value of the monster
(numeric) challenge rating (CR) of the monster. Note that this is NOT necessary if XP is provided