Half Maiden/Half Fish. All murderous death of the seas. Found out to sea, luring sailors to their deaths.
Swim Like a Fish (Passive): Mermaids swims at normal move speed but move at half speed on land.
Tail Slap (Cost 3): Mermaids have tails that allow them to slap their foes for 15 damage.
Trident Stab (Cost 5): Mermaids carry might tridents that allow them to stab their foes for 20 damage.
Lightning Strike (Cost 10): Mermaids have the ability to fire lightning out of their tridents. This flies in a straight line for 100 squares. Any entity in the line of the attack takes 20 damage. Roll precision to hit.
Ridiculous Sex Appeal (Passive): Mermaids have a certain mystical appeal, when attack by people that would be reasonably attracted to them, the opponent takes a permanent -2 to hit them.