Ampule Chamber

{2}{b}: Put a black 0/1 Worm onto the battlefield.
{1}{b}, {t}: Put a black goo counter on a worm. It becomes a colorless 2/1 Alien Hammerpede with Provoke and Undying .
When an Alien Hammerpede deals damage to a creature, that creature gains Vanishing 3. When that creature dies, put a colorless 1/1 Alien Trilobite creature token with Trample, and Evolve onto the battlefield under your control.