Primary Cradle

When Primary Cradle enters the battlefield,
create {x} 1/1 black Demon creature token with
flying.
{x}{x},{t}: create {x} 1/1 black Demon creature
token with flying.
{x}{x},{t}: Search your library and/or graveyard
for a demon creature with converted mana cost {x} or less and put it onto the battlefield. If you
search your library this way, shuffle it.
{t}: Add {b} for each demon you control.