Cocoon

Oracle Text

Enchant creature you control

When Cocoon enters the battlefield, tap enchanted creature and put three pupa counters on Cocoon.

Enchanted creature doesn't untap during your untap step if Cocoon has a pupa counter on it.

At the beginning of your upkeep, remove a pupa counter from Cocoon. If you can't, sacrifice it, put a +1/+1 counter on enchanted creature, and that creature gains flying.

Card Rulings

10/4/2004 The creature can still be untapped using spells and abilities.
10/4/2004 Cocoon can be used on a tapped creature.
8/1/2005 If the Aura is moved to a different creature, the number of counters is unchanged.