Efreeti Bottle

his painted brass bottle weighs 1 pound. When
you use an action to remove the stopper, a cloud
of thick smoke flows out of the bottle. At the end
of Your Turn, the smoke disappears with a flash
of harmless fire, and an Efreeti appears in an
unoccupied space within 30 feet of you. See the
Monster Manual for the efreeti's Statistics. The
first time the bottle is opened, the DM rolls to
determine what happens.
d100 Effect: 01-10: Absolute Disaster
11-90: Could be Convenient 91-00: Amazing