Liurnia of the Lakes

Liurnia enters the battlefield tapped.
{t} Add {g} or {u} to your mana pool.
When Liurnia of the Lakes enters the battlefield
search your library for Raya Lucaria Academy and
put it into your hand.
With its shallow waters and vast wetlands, the region
of Liurnia is beset with the gradual sinking of most of
its landmass.