The Primordial Sea

You may cast permanents from your hand
without paying their mana cost.
As the people of Fontaine were once Oceanids who
longed for human life, the first Hydro Archon Egeria
used the Primordial Sea's life-granting properties
to give the Oceanids human forms. These Oceanids
and their descendants would become the humans of Fontaine, but as their forms were derived from the Primordial Sea, coming into contact with the
Primordial Sea's waters would cause them to dissolve
into water and turn