Hidden Refuge

Hidden Refuge enters the battlefield tapped.
When Hidden Refuge enters the battlefield, you
may search your library for up to three Survivor creatures and put them onto the battlefield.
{t}: Add {g} or {c} to your mana pool. You may
return up to three creatures you control to your
hand at any time.
{t}: Sacrifice Hidden Refuge. Add {g}{g}{g} to your
mana pool.