Blue Lagoon

{t}: Add {u}{u} or {u}{b} to your mana pool.
{1}{b}, {t}: Create a 1/1 black Siren
creature token with Deathtouch.
{1}{u}, {t}: Create a 1/1 blue Mermaid
creature token with Hexproof.
If you are lucky and stumble upon the Blue Lagoon,
you may see at times a shapeless pool of lovely pale
colors suspended in the shining sun.