Enter the Egg Chamber

Create two 0/1 black Egg creature tokens with 3 Hatch counters on each token and "At the beginning of your upkeep, remove a Hatch counter from this creature." Then, if there are no Hatch counters on this creature, destroy it and
put an Infection counter on target creature. (Creatures with infection counters on them are destroyed at the next end step. If a creature is destroyed this way it's opponent creates a 5/5 black Alien creature token with Fear and Deathtouch)