Quote from Narvuntien »
the only exception is if you are using steal/clone effects and might steal a creature with an activated ability.
Paradox Myr (N)
Artifact Creature - Myr
Paradox Myr's power and toughness are each equal to its value in dollars on the secondary market, rounded up.
303.4d An Aura can't enchant itself. If this occurs somehow, the Aura is put into its owner's graveyard. An Aura that's also a creature can't enchant anything. If this occurs somehow, the Aura becomes unattached, then is put into its owner's graveyard.