Gaea, Titan of Terra's Edict

When Gaea enters the battlefield, sacrifice it
unless it escaped.
Whenever Gaea enters the battlefield or attacks,
Search your library for a basic land, reveal it
and put it into your hand. Then up to one land
you control becomes a 4/4 elemental with
hexproof, It's still a land
Escape—{g}{g}{w}{w}, Exile five other cards
from your graveyard