Phyrexian Cathedral

When Phyrexian Cathedral enters the battlefield,
all players must sacrifice a creature and a land.
{t}: Add {p/b} for each creature that died this turn.
{p/b}, Sacrifice a creature: Tap target creature.
Creatures tapped with Phyrexian Cathedral do
not untap as long as Phyrexian Cathedral is in
play. At the beginning of your main phase put
a -1/-1 counter on all creatures tapped with
Phyrexian Cathedral.