Blackpool Oasis

Blackpool Oasis comes into the battlefield tapped unless you pay 2 life.
If a creature you control would die, exile it instead.
{t}Add {b}{g} to your mana pool, you lose 2 life.
{p/b}{p/b}{p/g}{p/g}{t}: Put all creatures exiled this way into
play with haste, exile Blackpool Oasis.
The souls of the lost eventually find their way to the
Oasis, they're taken care of there. But eventually,
they all find their way back.