For example, you are a GM and after character creation, one player comes to you and wants to re-roll their stats. They say they rolled all 1s and 2s on their 4d6s for a stat and they feel this was so unlikely that it will make the game be unbalanced for their...
Where the chart is green, Faerie Fire is better than Bless, where it is yellow Faerie Fire is worse than Bless, but still better than nothing, and Red you just wasted a spell slot on Faerie Fire (on average), because the expected increase in damage from FF is no better t...
Not usually, as Kelvin points out, but other modifiers are possible: Wizards of at least 10th level and the Arcane Tradition of Abjuration get Improved Abjuration, allowing them to add their proficiency bonus to ability checks made as part of casting spells such as dispel...