Air Tyrant

Flying (This creature can't be blocked except by creatures with flying and/or reach)

{g}{w}{2}{t}: Tap target creature and attach it to this creature; it cannot untap. At the beginning of your upkeep, gain a "Drop" counter. You may un-attach the attached creature at any time

If this creature is destroyed or a creature is un-attached to it, deal X damage to that creature, where X is the number of Drop counters you have. Remove all Drop counters.