Bisaadi's "Blessing"

You "bless" one willing creature that you are familiar with and they are bestowed with a customized effect from your blessing. Before casting you must have a list of 4 possible blessing effects for the target and roll 1d4 for which effect the target is 'blessed' with. The effect must be bestowed upon the target regardless of outcome. "Blessings" can last between 10 minutes and  100 minutes determined by you rolling a 1d10. You do not need to be able to see your target but they must be aware you are casting this spell or it will fail.