Consecrated Graveyard

This land enters the battlefield tapped and
doesn't untap on your next turn.
{t}: Add {c} to your manapool.
{1}{w}{t} Exert Consecrated Graveyard. Consecrated Graveyard gains protection from black until the end of turn.
{3}{w}{u}: Until end of turn, Consecrated Graveyard becomes a 4/4 Angel Creature with Flying and Vigilance. It's still a land. Activate this ability only if you control a plains or an island.