Tomb of Osiris

{b}{w} put a 1/1 black and white zombie into play with lifelink
If Tomb of Osiris is put into graveyard from play, put it in exile instead and put 3 2/2 zombie priests with lifelink and deathtouch.
If you are to die, instead set your life total to
X time 2. For example. If you spent 3 mana for X, then life total if to die would become 6. Then sacrifice Tomb of Osiris.
No one has dared to look in through the doors of the tomb