Frenzy of the Earthern Dragon

Frenzy of the Earthern Dragon enters the battlefield with 3 frenzy tokens on it.
Remove a frenzy token: Target creature gets +3/+3 until end of turn and can attack up to 3 times this turn. Prevent all damage dealt to the opposing player by this creature until end of turn. If this card is out of frenzy tokens, you lose 3 life and send this card to your graveyard.