Great Tomb of Nazarick

Great Tomb of Nazarick enter the battlefield tapped.
{t}: Add{c}
{b},{t}: Put a 1/1 black skeleton token with {b}: Regenerate into play.
{b}{b},{t}: Put a 2/2 black vampire token with flying into play.
{b/r}{b/r}{b/r}{b/r},{t}: Put a 5/5 black undead knight with indestructible into play.