Shadows of Delusion

Enchant creature
Whenever enchanted creature attacks, create
a 1/1 black shadow creature with indestructible
and "At the beginning of the end step, sacrifice
this creature." that's blocking that creature.
Delirium — At the beginning of your upkeep,
if there are four or more card types among cards
in your graveyard, create a 1/1 black shadow
creature with indestructible and "At the
beginning of the end step, sacrifice this creature."