Xenomorph Queen

At the beginning of each end step, create a 1/1 Facehugger creature token with "{1}{t}: Attach to target non-artifact creature an opponent controls. Attach only as a sorcery. As long as Facehugger is attached to a creature it loses all other abilities and cannot attack or block. At the beginning of your upkeep you may pay {2}, if you do, sacrifice Facehugger and create a 3/3 Xenomorph creature token with Acid Blood 1."

Aliens you control get +1/+1 and have Fear