Godriq, the Dragonwhisperer

Whenver a Dragon enters the battlefeild put a +1/+1 counter on Godriq, the Dragonwhisperer.
If Godriq, the Dragonwhisperer has three or more +1/+1 counters on him he is a Dragon in addition to his other types and has Flying and {2}{r}{r}{r},{t}: Deal X damage to any target where X is the number of +1/+1 counters on Godriq, the Dragonwhisperer.