Sectoid (XCOM2)

The latest and most dangerous variant of the Sectoid race, they have been hybridized with human DNA. The result is a much tougher adversary, combining physical stamina and human psionic potency with the Sectoid's experience in psionic skills: they come right out of the cloning vats with the full suite of psionic powers, including Mind Control, Psi Panic, and a Mind-Fray-like attack. Most disturbingly, they now have the ability to 'mind control' dead humans (XCOM or otherwise) into Zombie-like puppets. Fortunately, these zombies are not Chryssalids, and they will also die right away if the controlling Sectoid is killed: if it decides to spend it's turn reanimating a corpse instead of attacking you, you may want to press the advantage to eliminate it, taking care of them both.

They'll often be escorted by Advent Troopers, who have taken their place as the canonfodder grunt of the alien forces. Rumor has it that this apparent bond is... near-familial.