Skulking Viper

Protection from green, venemous (Whenever this creature deals combat damage to a creature, destroy that creature at the end of combat.)
Skulking Viper enters the battlefield with X +1/+1 counters on it, where X is the number of creatures you control that share a creature type with Skulking Viper.
With his 15 meter long body, small wings and poison fangs, even dinosaurs do not dare to battle this creature.