Beina, Goddess of the Sea

At the beginning of each upkeep, add {u}{u} to your mana pool.
{p/u}{p/u}Pay {x} life. Search your library for a blue card with converted mana cost {x} or less, reveal it and put it into your hand.
{t}{u}Put a 2/2 blue merfolk creature token with islandwalk onto the battlefield under your control.