Roll 4d6 and drop the lowest number. Reroll 1's a single time. Stats are placed as you wish. Roll 2 stat blocks. If you select one of the two as your final statblock, you're done. If you would like you can roll a 3rd stat block, but you must discard one of your original 2 in order to roll a 3rd. You may then roll an additional stat block and choose between the new stat block and the original you kept.