Secret Keeper

When Secret Keeper enter the battlefield it
becomes day if it's neither day or night.
Create two white 1/1 human tokens,
put two secrecy counters on two creatures,
those creatures' controllers draw a card each,
and discard a card when one of those creatures
dies. When day becomes night, target player
sacrifices all creatures with secrecy.
Deathtouch.
"Three can keep a secret. But the grave
keeps them all."