Screw Dinos

This enchantment cannot be countered.
When Screw Dinos enters the battlefield, exile all dinosaur creatures out of a target player's hand, library, and graveyard.
For every creature exiled this way, target
opponent loses 1 life and you gain 1 life.
Screw Dinos' power and toughness is equal to the number of creatures exiled due to the
enchantment.