Tomb of Lost Souls

{t}: Add {b}.
{b}{1}, {ut}: Put a 1/1 Ritual Zombie token in your
battlefield.
{b}{b}{2}, {ut}: Put a 1/2 Festival Mummy token in
your battlefield.
"Fools! You thought you had opened a simple tomb!
But it was actually a portal to the world of the dead!
Now nothing can stop them! Nothing!"