Ancient Snail Shell Spirit

Ward {2}(Whenever this creature becomes the
target of a spell or ability an opponent controls,
counter it unless that player pays {2}).
{u}{t}-Whenever a Merfolk or Mermaid enters
the battlefield create a 1/1 blue Snail Spirit token
{w}{t}-Whenever a Spirit enters the battlefield
create a 1/1 blue Snail Spirit token