Blattidae, Skull Shaper

Indestructible
Blattidae, Skull Shaper can't attack or block.
When Blattidae enters the battlefield, create X X/X Head creature tokens.
Head creatures you control have Menace and "When this creature enters the battlefield, you lose 1 life. When this creature dies, create 2 1/1 Head tokens."
When Blattidae leaves the battlefield, sacrifice all Heads you control. At the beginning of your end step, if you control no Heads, sacrifice Blattidae.
{x}{1}{r/b},{t}: Create an X/X Head token.