2d20a - advantage (returns the highest roll) 2d20d - disadvantage (the lowest roll) 1d12rr1 - reroll 1s 1d12rr1rr2 - these can all be chained so this would be reroll 1s and 2s 6d6kh3 - keep highest 3 6d6kl3 - keep lowest 3 4d10am8 - at most 8, returns the values equal to 8 or below 4d10al4 - at least 4, returns the values equal to 4 or higher

count 2d20al13 - counts the number of dice over 13 avg 2d20 - average 2d20 - averages the dice rolled