Castle of hidden secrets

When Castle of hidden secrets enters the battlefield create a 1/1 with when this creature
dies lose one life
{t} Add two {w/b} to your mana pool
When mana is used to play a creature you control create a 1/1 or pay {w/b}{w/b}{w/b}
instead to create a 4/4 this effect does not happen if it was a creature that was created
by Castle of hidden secrets
Whenever a creature you control dies or is exiled Castle of hidden secrets became a
creature until end of turn